4.16 A corporation has two construction contracts that are to be assigned to one or more of three firms (say I, II, and III) bidding for these contracts.

(One firm could receive both contracts.)

a List the possible outcomes for the assignment of contracts to the firms.

b If all outcomes are equally likely, find the probability that both contracts go to the same firm.

c Under the assumptions of part (b), find the probability that one specific firm, say firm I, gets at least one contract.