According to IDC, 70% of smartphones in the world use Google’s Android operating system in the fourth quarter of 2012. 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?