Suppose that in a group of five people A, B,C, D, and E the following pairs of people are acquainted with each other: A and C, A and D, B and C,C and D,C and E.
a. Draw a graph to represent this situation.
b. Draw a graph that illustrates who among these five people are not acquainted. That is, draw an edge between two people if, and only if, they are not acquainted.