 is represented by a node, and we place an edge between between two nodes if the people represented by those nodes have been in close proximity with one another on public transit or in a rideshare within the past seven days.</p>
<ol style="list-style-type: lower-alpha;">
<li>Should this graph be directed or undirected? Why? (Justify your response.)</li>
<li>Would you expect the graph to be connected or disconnected? Why? (Justify your response.)</li>
<li>Should we use an adjacency list or an adjacency matri