Figure details the process flow for two types of customers who enter Barbara€™s Boutique shop for customized dress alterations. After step T1, Type A customers proceed to step T2 and then to any of the three workstations at T3, followed by steps T4 and T7. After step T1, Type B customers proceed to step T5 and then steps T6 and T7. The numbers in parentheses are the minutes it takes to process a customer.

a. What is the capacity of Barbara€™s shop in terms of the numbers of Type A customers who can be served in an hour? Assume no customers are waiting at steps T1 or T7.
b. If 30 percent of the customers are Type A customers and 70 percent are Type B customers, what is the average capacity of Barbara€™s shop in customers per hour?
c. Assuming that the arrival rate is greater than five customers per hour, when would you expect Type A customers to experience waiting lines, assuming no Type B customers in the chop? Where would the Type B customers have to wait, assuming no Type Acustomers?

- (14) 12 (13) T4 (18 Type A (10) T1 (12) Type Aor B? 17 Type B T6 15)