$$c$)$ For the schedule developed using$$ Johnson's rule, the total length of time taken to complete the seven printing and binding jobs is

$$

$56$ hours $($enter your response as a whole$$ number$).$

Part $11$

$$d$)$ The idle time in the binding shop based on the sequence developed using$$ Johnson's rule is

$$

enter your response here $$hour$($s$)($enter your response as a whole$$ number$).$