Use the table below to answer questions on the number of TV sets per household in the United States. # TV Sets 0 1 2 3 4 5 or more Prob. 0.092 0.275 0.101 0.194 0.035 0.303 a. Verify that this is a probability model. b. Find (3 4) c. Find ( ) d. Find (4) e. Is (4) an unusual event? Why?