Skill D1.  Consider a penny fab that has the following four…

Skill D1.  Consider a penny fab that has the following four workstations:                                                                Number of               Process                  Process                          Workstation                   machines              time mean           time std. dev.                                                                                                (hours)                   (hours)                      1. Head stamping                     ?                            1                            2                       2. Tail stamping                      ?                            2                            2                           3. Rimming                          ?                            6                            3                          4. Deburring                         ?                            2                            5 Pennies arrive at a rate of 0.8 parts per hour, and the arrival SCV = 0.25. What is the minimum number of machines needed at each workstation?