4. Consider a 15-table Benihana Restaurant. Assume total dining time equals 60 minutes (per table of 8), and dining start times are evenly spaced. 4.a. How many customers can the restaurant serve in an hour? Answer: 4.b. On November 5, 1972, on average, a customer arrived in the restaurant every 90 seconds. On average, how many customers did the restaurant serve in an hour? Answer: 4.c. On November 5, 1972, on average, a customer arrived in the restaurant every 90 seconds. How often did a table exit the restaurant (the average time between table exits)? Answer: