A national polling company polled Canadians about their coffee consumption and made the following discovery: 80% of Canadians have at least one cup of coffee a day. Two Canadians are randomly chosen on a randomly chosen day. What is the probability

Part (a) both consume at least one cup of coffee on the chosen day?

Part (b) Refer to the two Canadians chosen in part (a). Find the probability that neither consumes any coffee over the course of the chosen day.

Part (c) Suppose you are to randomly inspect three Canadians on a randomly chosen day. Find the probability that at least two of the three has consumed at least one cup of coffee.

Part (d) Suppose you are to randomly pick n-Canadians until the probability that at least one of them has consumed at least one cup of coffee (on the randomly chosen day) is 0.98. How large must n be?