An Assembly Line to Be Balanced Has Six Tasks in Precedence.The

An assembly line to be balanced has six tasks in precedence.The task times are shown in the following table.Based on demand forecasts,the output rate has to be 160 units per day.The line operates 8 hours a day.Calculate the desired cycle time C.
$$\begin{array} { | l | l | l | } \hline \text { Tasks } & \text { lmmediate Predecessor } & \text { Task Time in Minutes } \\\\\hline \text { A } & \text { NONE } & 3 \\\hline \text { B } & \text { A } & 1 \\\hline \text { C } & \text { A } & 2 \\\hline \text { D } & \mathrm { B } , \mathrm { C } & 3 \\\hline \text { E } & \mathrm { C } & 3 \\\hline \text { F } & \mathrm { D } , \mathrm { E } & 2 \\\hline\end{array}$$

A) 3 minutes/unit
B) 4 minutes/unit
C) 5 minutes/unit
D) 6 minutes/unit