Suppose that the arrival of customers into a store follows a stationary Poisson

process with a constant rate of 50 customers per hour. Of the customers

arriving, 40% are female and 70% are between the ages of 40 and 60 years,

inclusive. Determine the probability that more that 80 females between the

ages of 40 and 60 years, inclusive, arrive in the store during the first 5 hours

of business