2521 23t3 (#253)

* added slides for sorting algos and trees for 2521 rev sess

* added liam's time complexity slide

Author: Allynixtor

data/course-revision/2521-23T3.mdx

@@ -77,3 +77,17 @@ $ 2521 fetch revision
     height="474"
   />
 </a>
+
+### [Time complexity analysis](https://www.canva.com/design/DAFziX5NkMg/ye7qwcCh1VNywPqL_pz-rw/view?utm_content=DAFziX5NkMg&utm_campaign=designshare&utm_medium=link&utm_source=editor#1)
+
+<a
+  href="https://www.canva.com/design/DAFziX5NkMg/ye7qwcCh1VNywPqL_pz-rw/view?utm_content=DAFziX5NkMg&utm_campaign=designshare&utm_medium=link&utm_source=editor#1"
+  target="_blank">
+  <img
+    src="/images/comp2521-revision/2521-time-complexity-slidecover.png"
+    alt="2521-tree-slides"
+    width="800"
+    height="474"
+  />
+</a>
+