Utilization, efficiency, and productivity $(10$ marks$)$

The operations manager from $Q6$ creates $an{8}_h$our shift with $a{?}_{(}30{)}_m$inute lunch and ${?}_{(})$

two $10$ minute breaks, one $in$ the morning and one $in$ the afternoon. With personal

bathroom and other breaks such $as$ stretching, the manager feels the workers actually

put $in7$ hours $of$ productive time $in$ the shift. The manager uses $3$ workers $to$ switch the

connectors. After each shift each worker $on$ average produces $58$ sets $of20$ connectors.

$a$