a$.$ How many parallel lines must be run? b$.$ If workers are dedicated to each step and cannot be deployed elsewhere if idle, what percentage of time will workers be idle?$3.$ A manufacturer of specialty belts needs a process that can produce $80$ units in an $8-$hour shift. The manufacture has three different tasks with times as shown in the following table:$$Task$$A B$$C Description$$Cutting the materials Sewing$/$assembling Finishing$$Time$($minutes$)12163$