4.116 A Reticent Salesman A salesperson figures that the probability of consummating a sale during the first contact with a client is 0.4 but improves to 0.55 on the second contact if the client did not buy during the first contact. Suppose this salesperson makes one and only one callback to any client. If she contacts a client, calculate the probabilities for these events:

a. The client will buy.

b. The client will not buy.