9.2 The supervisor at the American airline check-in counter observes the following process characteristics: all the agents can, together, complete checking in 100 customers per hour on average; there are, on average, 36 customers either waiting in line or being helped by an agent for check-in Q: how much time, on average, does each customer have to spend in the check-in area? 9.3 The supervisor at the American airline check-in counter observes the following process characteristics: there are, on average, 20 customers either walting in line or being help by an agent for check-in, the average amount of a passenger spends on check-in is 16 minutes from start to end : a) How many passengers can American Airlines complete checking them in per hour? bj How often does one passenger complete check-in and exit the area? 9.11 Stanford Rosenberg Computing wants to establish an assembly line for producing a new product, the Personal Digital Assistant (PDA). The tasks, task times, and immediate predeces sors for the tasks are as follows: sors ot the tasks are as