The First National Mortgage Company has noted that 11% of its customers pay their mortgage payments after the due date. Upload a file detailing all of the work needed to answer the questions. Assume the data is normally distributed. a. Given a random sample of 150 customers, calculate the mean of the sample. b. Given a random sample of 150 customers, calculate the standard deviation of the sample. What is the probability that in a random sample of 150 customers less than 20 will be late on C. their payments? d. What is the probability that in a random sample of 150 customers at least 10 will be late on their payments