a) Compute the probability that exactly 5 of the 15 Americans surveyed are satisfied with the

1. a)  Compute the probability that exactly 5 of the 15 Americans surveyed are satisfied with the way things are going in the United States.

2. b)  Compute the probability that at least 3 of the Americans surveyed are satisfied with the way things are going in the United States.

3. c)  Compute the probability that no more than 4 of the Americans surveyed are satisfied with the way things are going in the United States.

4. d)  Compute the probability that more than 2 but less than 6 of the Americans surveyed are satisfied with the way things are going in the United States.

5. e)  Compute the expected value, variance, and standard deviation of the number of Americans who are satisfied with the way things are going in the United States.