diff --git a/wk22-icon.svg b/wk22-icon.svg
new file mode 100644
index 0000000..1a7c4fa
--- /dev/null
+++ b/wk22-icon.svg
@@ -0,0 +1,196 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="274.16013mm"
+   height="274.16013mm"
+   viewBox="0 0 274.16013 274.16013"
+   version="1.1"
+   id="svg914"
+   inkscape:version="1.1.2 (0a00cf5339, 2022-02-04)"
+   sodipodi:docname="wk22-icon.svg"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview916"
+     pagecolor="#505050"
+     bordercolor="#ffffff"
+     borderopacity="1"
+     inkscape:pageshadow="0"
+     inkscape:pageopacity="0"
+     inkscape:pagecheckerboard="1"
+     inkscape:document-units="mm"
+     showgrid="false"
+     fit-margin-top="0"
+     fit-margin-left="0"
+     fit-margin-right="0"
+     fit-margin-bottom="0"
+     inkscape:zoom="0.93859299"
+     inkscape:cx="524.18887"
+     inkscape:cy="433.09508"
+     inkscape:window-width="3832"
+     inkscape:window-height="2042"
+     inkscape:window-x="3840"
+     inkscape:window-y="114"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer1" />
+  <defs
+     id="defs911">
+    <filter
+       inkscape:collect="always"
+       style="color-interpolation-filters:sRGB"
+       id="filter1416"
+       x="-0.025931765"
+       y="-0.030187193"
+       width="1.0518635"
+       height="1.0603744">
+      <feGaussianBlur
+         inkscape:collect="always"
+         stdDeviation="1.2008292"
+         id="feGaussianBlur1418" />
+    </filter>
+  </defs>
+  <g
+     inkscape:label="Ebene 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(38.151157,6.9247675)">
+    <rect
+       style="fill:#003000;fill-opacity:1;fill-rule:evenodd;stroke-width:4.25979;stroke-linecap:round;stroke-linejoin:round;paint-order:markers fill stroke;stop-color:#000000"
+       id="rect1464"
+       width="274.16013"
+       height="274.16013"
+       x="-38.151157"
+       y="-6.9247675"
+       ry="0.27519047" />
+    <rect
+       style="fill:#0000ff;fill-opacity:1;fill-rule:evenodd;stroke-width:4.25979;stroke-linecap:round;stroke-linejoin:round;paint-order:markers fill stroke;stop-color:#000000"
+       id="rect2802"
+       width="30.408995"
+       height="19.335896"
+       x="98.555107"
+       y="132.50075"
+       ry="0.27519047" />
+    <path
+       id="path1401-9"
+       d="m 98.023772,214.01618 h -0.0775 c -3.95292,0 -7.94179,-0.23353 -11.84617,-0.69761 l 4.95031,-41.6141 c 2.27382,0.27123 4.58871,0.40789 6.89586,0.40789 l 0.5329,0.005 -0.45638,17.84743 z"
+       style="display:inline;fill:#656767;stroke-width:1.38539"
+       inkscape:connector-curvature="0" />
+    <path
+       id="path1403-2"
+       d="m 81.750412,200.57044 c -3.33777,-0.75673 -6.67292,-1.692 -9.9107,-2.78918 l 13.44069,-39.69402 c 1.86882,0.63268 3.78889,1.17661 5.71158,1.61241 z"
+       style="display:inline;fill:#009c47;stroke-width:1.38539"
+       inkscape:connector-curvature="0" />
+    <path
+       id="path1405-4"
+       d="m 120.91891,202.35465 -14.89937,-39.16334 c 1.84061,-0.69954 3.66845,-1.50994 5.43475,-2.3995 l 18.88311,37.40986 c -3.05834,1.53811 -6.22693,2.9404 -9.41849,4.15298"
+       style="display:inline;fill:#009c47;stroke-width:1.38539"
+       inkscape:connector-curvature="0" />
+    <path
+       id="path1407-4"
+       d="m 63.551732,202.10342 c -3.10959,-1.43308 -6.175577,-3.03528 -9.115996,-4.77074 l 21.354376,-36.05643 c 1.69965,1.00497 3.47109,1.93548 5.26559,2.75588 z"
+       style="display:inline;fill:#057248;stroke-width:1.38539"
+       inkscape:connector-curvature="0" />
+    <path
+       id="path1409-59"
+       d="m 141.78622,206.29478 -22.65416,-35.25143 c 1.66118,-1.07147 3.28903,-2.23535 4.83491,-3.47097 l 26.16362,32.73144 c -2.6636,2.13031 -5.47836,4.14774 -8.34437,5.99096"
+       style="display:inline;fill:#656767;stroke-width:1.38539"
+       inkscape:connector-curvature="0" />
+    <path
+       id="path1411-1"
+       d="m 150.94059,191.50822 -29.38851,-29.87047 c 1.65092,-1.62272 3.21472,-3.3608 4.65286,-5.16297 l 32.75709,26.1303 c -2.48155,3.10948 -5.18352,6.10375 -8.02144,8.90314"
+       style="display:inline;fill:#057248;stroke-width:1.38539"
+       inkscape:connector-curvature="0" />
+    <path
+       id="path1413-28"
+       d="m 36.542168,180.7593 c -2.489207,-3.1122 -4.816895,-6.40886 -6.916403,-9.78763 l 35.610217,-22.0799 c 1.21771,1.95852 2.56613,3.86583 4.0094,5.67062 z"
+       style="display:inline;fill:#057248;stroke-width:1.38539"
+       inkscape:connector-curvature="0" />
+    <path
+       id="path1415-96"
+       d="m 35.714143,161.60183 c -1.494526,-3.07879 -2.837812,-6.26785 -4.004274,-9.4877 l 39.404333,-14.25592 c 0.67145,1.85353 1.44841,3.69413 2.30724,5.46808 z"
+       style="display:inline;fill:#009c47;stroke-width:1.38539"
+       inkscape:connector-curvature="0" />
+    <path
+       id="path1417-0"
+       d="m 179.7062,163.02716 -39.89905,-12.80489 c 0.59781,-1.87145 1.10997,-3.79405 1.50993,-5.72696 l 41.01939,8.5674 c -0.70245,3.35819 -1.58686,6.71135 -2.63027,9.96445"
+       style="display:inline;fill:#656767;stroke-width:1.38539"
+       inkscape:connector-curvature="0" />
+    <path
+       id="path1419-6"
+       d="m 25.829124,146.97168 c -0.817752,-3.30954 -1.479221,-6.70622 -1.953399,-10.09787 l 41.501327,-5.81408 c 0.27709,1.9637 0.6511,3.92986 1.12538,5.83718 z"
+       style="display:inline;fill:#656767;stroke-width:1.38539"
+       inkscape:connector-curvature="0" />
+    <path
+       id="path1421-4"
+       d="m 173.95877,145.25926 -41.68338,-4.27603 c 0.19961,-1.96884 0.30229,-3.97862 0.30229,-5.96798 l 41.90894,-0.45345 v 0.5998 c 0,3.26593 -0.1773,6.71397 -0.52806,10.09787"
+       style="display:inline;fill:#057248;stroke-width:1.38539"
+       inkscape:connector-curvature="0" />
+    <path
+       id="path1423-09"
+       d="m 141.09404,132.64145 c -0.25097,-2.29698 -0.6356,-4.60423 -1.15619,-6.84471 l 40.82455,-9.44414 c 0.90011,3.88636 1.57146,7.86754 1.99448,11.83851 z"
+       style="display:inline;fill:#009c47;stroke-width:1.38539"
+       inkscape:connector-curvature="0" />
+    <path
+       id="path1425-4"
+       d="m 61.854712,122.52311 -40.88356,-9.1929 c 0.879763,-3.89401 2.002137,-7.78549 3.345423,-11.54882 l 39.463337,14.08928 c -0.77125,2.17393 -1.42535,4.40677 -1.9252,6.65244"
+       style="display:inline;fill:#009c47;stroke-width:1.38539"
+       inkscape:connector-curvature="0" />
+    <path
+       id="path1427-5"
+       d="M 74.728882,118.8982 36.944648,100.77392 c 1.48174,-3.083907 3.137785,-6.124317 4.92977,-9.033927 l 35.699924,21.941447 c -1.03052,1.67656 -1.99186,3.43511 -2.84546,5.21676"
+       style="display:inline;fill:#656767;stroke-width:1.38539"
+       inkscape:connector-curvature="0" />
+    <path
+       id="path1429-4"
+       d="m 129.57855,118.62649 c -1.10483,-1.64325 -2.30462,-3.2454 -3.56846,-4.7656 L 158.2057,87.041013 c 2.18933,2.63018 4.26065,5.39117 6.1628,8.22898 z"
+       style="display:inline;fill:#057248;stroke-width:1.38539"
+       inkscape:connector-curvature="0" />
+    <g
+       id="g1422"
+       transform="matrix(1.11271,0,0,1.11271,-15.709801,-35.950017)">
+      <path
+         style="fill:#ffffff;stroke-width:0.264583;filter:url(#filter1416)"
+         d="m 106.73236,237.40502 c -1.12408,-0.59308 -2.01435,-2.16752 -2.02424,-3.57985 -0.004,-0.56785 2.75153,-6.35861 8.71862,-18.3224 l 8.72443,-17.49215 H 110.8365 c -12.246776,0 -12.910946,-0.0626 -15.707646,-1.47976 -2.80759,-1.42272 -5.31862,-4.76534 -6.00381,-7.99211 -0.41104,-1.93574 -0.41474,-34.65782 -0.004,-36.61875 0.6894,-3.2924 3.16339,-6.55066 6.10618,-8.04189 2.90855,-1.47387 1.88975,-1.42998 33.198006,-1.42998 20.15359,0 29.3277,0.0889 30.30534,0.29358 4.4448,0.93071 8.22613,4.71374 9.17415,9.17829 0.41457,1.95231 0.41457,34.66644 0,36.61875 -0.94802,4.46455 -4.72935,8.24758 -9.17415,9.17829 -0.89979,0.18841 -5.42283,0.29358 -12.62546,0.29358 h -11.22337 l 8.72286,17.49933 c 5.90252,11.84132 8.72285,17.7687 8.72285,18.33247 0,0.45824 -0.26789,1.36346 -0.59531,2.0116 -1.0313,2.04148 -3.53381,2.64316 -5.6224,1.35179 -0.65862,-0.40723 -2.21256,-3.35428 -9.12812,-17.31158 -4.58391,-9.25144 -8.39391,-16.82068 -8.46667,-16.82053 -0.0728,1.5e-4 -3.91313,7.61821 -8.53415,16.92901 l -8.40185,16.92873 -1.12315,0.50982 c -1.42593,0.64726 -2.44667,0.63733 -3.7233,-0.0362 z m 19.66991,-71.63496 c 2.76316,-1.47032 2.70005,-5.68634 -0.10505,-7.01744 -0.7786,-0.36947 -2.13265,-0.4295 -9.68866,-0.4295 -9.71322,0 -10.0133,0.0453 -11.18385,1.68627 -0.82196,1.15231 -0.82354,3.41043 -0.003,4.56046 1.17265,1.64394 1.39954,1.6781 11.1912,1.68475 8.13407,0.006 8.94393,-0.0346 9.78958,-0.48454 z m 59.19639,21.83416 -9.45885,-2.42275 v -14.95232 -14.95232 l 9.72344,-2.45483 c 5.34789,-1.35017 9.99607,-2.45069 10.32929,-2.44561 1.13462,0.0173 2.66878,1.02464 3.22704,2.11892 0.51725,1.01389 0.53273,1.52919 0.53273,17.73406 0,16.20488 -0.0155,16.72018 -0.53273,17.73407 -0.61431,1.20415 -2.15047,2.12216 -3.49163,2.08661 -0.47874,-0.0127 -5.12692,-1.11332 -10.32929,-2.44583 z"
+         id="path1179"
+         sodipodi:nodetypes="ssscssscsscsssscssssssscssscsssccccscccsssssss" />
+      <path
+         style="fill:#000000;stroke-width:0.264583"
+         d="m 106.73236,237.40502 c -1.12408,-0.59308 -2.01435,-2.16752 -2.02424,-3.57985 -0.004,-0.56785 2.75153,-6.35861 8.71862,-18.3224 l 8.72443,-17.49215 H 110.8365 c -12.246777,0 -12.910947,-0.0626 -15.707647,-1.47976 -2.807589,-1.42272 -5.318619,-4.76534 -6.003809,-7.99211 -0.41104,-1.93574 -0.41474,-34.65782 -0.004,-36.61875 0.6894,-3.2924 3.16339,-6.55066 6.106179,-8.04189 2.90855,-1.47387 1.88975,-1.42998 33.198007,-1.42998 20.15359,0 29.3277,0.0889 30.30534,0.29358 4.4448,0.93071 8.22613,4.71374 9.17415,9.17829 0.41457,1.95231 0.41457,34.66644 0,36.61875 -0.94802,4.46455 -4.72935,8.24758 -9.17415,9.17829 -0.89979,0.18841 -5.42283,0.29358 -12.62546,0.29358 h -11.22337 l 8.72286,17.49933 c 5.90252,11.84132 8.72285,17.7687 8.72285,18.33247 0,0.45824 -0.26789,1.36346 -0.59531,2.0116 -1.0313,2.04148 -3.53381,2.64316 -5.6224,1.35179 -0.65862,-0.40723 -2.21256,-3.35428 -9.12812,-17.31158 -4.58391,-9.25144 -8.39391,-16.82068 -8.46667,-16.82053 -0.0728,1.5e-4 -3.91313,7.61821 -8.53415,16.92901 l -8.40185,16.92873 -1.12315,0.50982 c -1.42593,0.64726 -2.44667,0.63733 -3.7233,-0.0362 z m 19.66991,-71.63496 c 2.76316,-1.47032 2.70005,-5.68634 -0.10505,-7.01744 -0.7786,-0.36947 -2.13265,-0.4295 -9.68866,-0.4295 -9.71322,0 -10.0133,0.0453 -11.18385,1.68627 -0.82196,1.15231 -0.82354,3.41043 -0.003,4.56046 1.17265,1.64394 1.39954,1.6781 11.1912,1.68475 8.13407,0.006 8.94393,-0.0346 9.78958,-0.48454 z m 59.19639,21.83416 -9.45885,-2.42275 v -14.95232 -14.95232 l 9.72344,-2.45483 c 5.34789,-1.35017 9.99607,-2.45069 10.32929,-2.44561 1.13462,0.0173 2.66878,1.02464 3.22704,2.11892 0.51725,1.01389 0.53273,1.52919 0.53273,17.73406 0,16.20488 -0.0155,16.72018 -0.53273,17.73407 -0.61431,1.20415 -2.15047,2.12216 -3.49163,2.08661 -0.47874,-0.0127 -5.12692,-1.11332 -10.32929,-2.44583 z"
+         id="path1396"
+         sodipodi:nodetypes="ssscssscsscsssscssssssscssscsssccccscccsssssss" />
+    </g>
+    <path
+       id="path1431-6"
+       d="M 72.806192,108.78499 39.562035,83.277713 c 2.073935,-2.71225 4.31452,-5.33991 6.660132,-7.81632 l 30.452365,28.780997 c -1.3586,1.43815 -2.65837,2.96349 -3.86834,4.5426"
+       style="display:inline;fill:#057248;stroke-width:1.38539"
+       inkscape:connector-curvature="0" />
+    <path
+       id="path1433-63"
+       d="m 133.35727,104.79359 c -1.42021,-1.38174 -2.92763,-2.70971 -4.47855,-3.94273 l 26.04309,-32.828887 c 2.66864,2.11753 5.26045,4.40162 7.70344,6.7858 z"
+       style="display:inline;fill:#009c47;stroke-width:1.38539"
+       inkscape:connector-curvature="0" />
+    <path
+       id="path1435-9"
+       d="m 123.49783,104.27836 c -1.94827,-1.24341 -3.98121,-2.37392 -6.06028,-3.37111 l 18.07824,-37.802157 c 3.59917,1.7227 7.12665,3.68386 10.50027,5.82445 z"
+       style="display:inline;fill:#656767;stroke-width:1.38539"
+       inkscape:connector-curvature="0" />
+    <path
+       id="path1437-9"
+       d="M 83.393662,94.539343 65.084732,56.847545 c 3.59414,-1.745866 7.32663,-3.283993 11.0976,-4.583678 l 13.61248,39.632506 c -2.17383,0.74606 -4.32722,1.63551 -6.40115,2.64297"
+       style="display:inline;fill:#009c47;stroke-width:1.38539"
+       inkscape:connector-curvature="0" />
+    <path
+       id="path1439-5"
+       d="m 94.765562,102.92479 -9.40309,-40.837427 c 3.32488,-0.763497 6.73445,-1.363729 10.13112,-1.781619 l 5.124518,41.591046 c -1.961058,0.24128 -3.934998,0.58909 -5.852548,1.028"
+       style="display:inline;fill:#656767;stroke-width:1.38539"
+       inkscape:connector-curvature="0" />
+    <path
+       id="path1441-2"
+       d="m 108.01654,94.967503 c -1.97908,-0.1618 -4.00166,-0.22285 -5.97822,-0.18217 l -0.8381,-41.896053 c 3.39416,-0.06781 6.85236,0.03875 10.24138,0.320713 z"
+       style="display:inline;fill:#057248;stroke-width:1.38539"
+       inkscape:connector-curvature="0" />
+  </g>
+</svg>