Please help somewhat confused on all parts

Repair calls are handled by one repairman st a photocopy shop. Repair time, including travel time, is exponentisly distributed, with a mean of 2.0 hours per call. Requests for oopier repairs oome in at a mean rste of 2.1 per eight-hour day (assume Poisson) a. Determine the average number of oustomers awaiting repairs (Round your answer to 2 decimal places.) Number of customers 0.58 b. Determine system utilization. (Round your answer to the nearest whole percent. Omit the "%" sign in your response.) System utlization 53 % c. Determine the amount of time c. Detemine the amount of time during an eight-hour day that the repairman is not out on a call (Use your Round your answer to 2 decimal places) Amount of time 3.76 hours d. Determine the probability of two or more customers in the system. (Do not round calculations. Round your answer to 4 decimal places) Probability 0.2494 Hints References eBook& Resources