This is a question for homework and i need to understand and answer.

An assembly line must process 10 parts per hour. There is an opportunity to purchase two types of machines that can process parts at different rates. Machine A can process parts at 15 per hour, Machine B at 10 parts per hour. The plant is considering buying 1 machine of Type A, 2 machines of Type B or 3 machines of Type B. Compare the three scenarios with regard to:

a. Traffic intensity ()

b. Steady state probability of zero parts in the system (0)

c. Utilization (U)

d. Average number of parts waiting to be processed (Lq)

e. Average wait time for parts that are waiting (Wq)

f. Average total time it takes to process the parts (W).