According to the National Marine Manu facturers Association, 50.0% of the population of Vermont were boating participants during the most recent year. For a randomly selected sample of 20 Vermont residents, with the discrete random variable x = the number in the sample who were boating participants that year, determine the following:
a. E(x)
b. P(x ≤8)
c. P(x = 10)
d. P(x = 12)
e. P(7 ≤ x ≤ 13)