1.The management of a shopping mall has observed that an average of 20,474 people enter the mall a day with a standard deviation of 8,243 people.

a.What is the probability that the average of people that enter the mall in any given week is less than 25,000?

b.What is the probability that the average number of people that enter the mall in any given week is less than 18,000?

c.What is the probability that the average number of people that enter the mall in any given month is at least 24,000? (Note: use 30 days in a month)