need solution asap

Problem 1: Tri-Cities Bank is planning to open drive-in teller service. Customers arrive randomly at the drive-in window, whose average inter-arrival time is 2 minutes. Assume the service provided at the drive-in window follows an exponential distribution. (Hint: use the excel template posted online for calculation) Compute the following operating characteristics for each alternative of the four service alternatives are being considered below: (a) Average number of cars waiting for service. (b) Average time a car waits for service. (c) Average time in the system. (d) Average number of cars in the system. (2) A single-channel operation where two employees work as a team to serve each customer. The average service time for this alternative (team) is 0.75 minutes. (10 points)