a> Show the sampling distribution of x, the sample mean annual sales per square foot for a sample of 64 Foot Locker Stores.

b> What is the probability that the sample mean will be within 15$ of the population mean?

c>Suppose you find a sample mean of 380$. What is the probability of finding a sample mean of 380$ or less? Would you consider such a sample to be an unusually low performing group of stores?

Can you please help with this exercise.

Thanks beforehand.