The one and only washing machine in the apartment-complex basement takes 42 minutes per load at a constant rate. Residents of the apartment complex arrive every 50 minutes hoping to do laundry, but these arrivals are exponentially distributed. Determine:
a. The average number of people waiting
b. The average time spent waiting (in hours)
c. The average time spent before a resident’s laundry is done with the washing machine (in hours)
(waiting and washing)