6-37. Suppose that a basketball player has a 75% of chance of making a freethrow shot. The player shoots free throws until a total of 10 are made. What is the probability that 12 shots will be required in order to sink 10 of them?

What is the probability that it will take 15 shots in order to sink 10 of them?

If X is the minimum number of free throws needed to sink 10 of them, find E(X) and V(X).