A warehouse takes orders from $8$ am $4$ pm$.$ The manager wants to analyze the process and has provided the process flow diagram shown below. There are three steps required to ship a customer order. The first step is to take the order from a customer. The second step is to pick the order for the customer, and the last step is to pack the order for shipping. The store promises that every order placed today gets shipped next day. So$,$ the picking and packing operations for all orders should be finished before they go home, which means that the employees should work overtime if necessary.