1)Customers arrive at a gallery in Tabuk at a rate of 5 per hour.

A)What is the probability that no more than 10 minutes will elapse before the next customer arrival?

B)What is the probability that more than 20 will elapse before the next customer arrival?

C)What is the probability that the next customer arrival is between 10 and 20 minutes?

D)What is the average and variance we expect that the time between two arrivals (the inter- arrival time)?

E)What is the probability of observing arrival of 8 customers in a given hour at the gallery?

F)What is the probability of observing arrival of more than 3 customers in a given hour at the gallery?