In this assignment, we’ll use the krack_full data to generate various network visualizations.

You need to complete the following tasks:

1. visualize friendship ties only

2. visualize reports-to ties only, and try different layout options

3. plot the reports-to network; color nodes by department, and set the vertex size by tenure

4. In addition to plotting the reports-to network, incorporate additional tie types.

- use the layout generated by the reports-to ties but overlay the advice and friendship ties in red and blue.
- edge attributes can be queried through E(..), and you can set edge color of a graph by calling E(graph)$color