Added week 2 and 3 exercises

Author: disarrayx

book/src/03_intro-react/index.md

@@ -0,0 +1,8 @@
+# Figma
+
+## Presentation Slides
+**Authors: Alyssa Cheong & Giselle Putri | [Link to slides](https://www.canva.com/design/DAGg9E5TJSA/Ewax_jT81t8lqPaMTkc3Cg/edit) | [Link to repository](https://github.com/devsoc-unsw/devsoc-mail/tree/ws2/components)** 
+
+Activities are on slide 45.
+
+<iframe src="https://www.canva.com/design/DAGg9E5TJSA/jJXUvzzmxGeFlOT0Wus-0g/view?embed" frameborder="0" width="800" height="450" allowfullscreen="true" mozallowfullscreen="true" webkitallowfullscreen="true"></iframe>

book/src/04_further-react/index.md

@@ -0,0 +1,8 @@
+# Figma
+
+## Presentation Slides
+**Authors: Lachlan Shoesmith | [Link to slides](https://www.canva.com/design/DAGSm5IgDSU/fRVbxTekEvoKCxAcG6VWCg/edit) | [Link to repo](https://github.com/devsoc-unsw/devsoc-mail/tree/ws3/react)**
+
+Activities are in the README.md file in the repo.
+
+<iframe src="https://www.canva.com/design/DAGSm5IgDSU/zdxO-cKL9jfhvzayAk6-Aw/view?embed" frameborder="0" width="800" height="450" allowfullscreen="true" mozallowfullscreen="true" webkitallowfullscreen="true"></iframe>

book/src/SUMMARY.md

@@ -10,3 +10,5 @@
   - [Installing Git, Node, NVM](01_getting-started/installation.md)
   - [(Optional) Additional Tools](01_getting-started/optional_extras.md)
 - [Figma](02_figma/index.md)
+- [Intro to React](03_intro-react/index.md)
+- [Further React](04_further-react/index.md)