need help asap please. thanks!!!

A system has three types of resources, A, B, and C. There are two parallel resources of A, three parallel resources of B, and one resource of C. Each resource A can service five customers in an hour. Each resource B can service three customers in an hour. Each resource C can service 11 customers in an hour. A total of 42 interarrival times of successive customers who arrive at the system are included in the table below. Each customer is serviced by resource A first, then resource B, and finally resource C. (a) What is the coefficient of variation of the customer arrival process? (b) Is the arrival process Poisson? Why or why not? (c) What is the system capacity? (d) What is the utilization of resource B