According to IDC, 87% of smartphones in the world use Google’s Android operating system in the third quarter of 2016. Answer the following questions based on a random sample of 14 smartphone users.

a. What is the probability that exactly nine people from this sample have a smartphone using the Android operating system?

b. What is the probability that all 14 people from this sample have a smartphone using the Android operating system?

c. What is the probability that 11 or fewer people from this sample have a smartphone using the Android operating system?

d. What are the mean and standard deviation for this distribution?