Bell computer is planning to launch a new high$-$end server. Nine steps or tasks are required to assemble this computer. Daily demand is expected to be $81$ units and there are three $8-$hour shifts available each day to meet this production quota.

Task$$Req$\text{'}$d Time $($in minutes$)$Predecessor$$A$14$NoneB$10$AC$6$BD$4$BE$11$AF$4$C$,$ DG$7$FH$15$EI$4$G$,$ H

$$What is the cycle time $($in minutes$)$ for this production line?

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What is the combined idle time $($in minutes$)$ for this production line?

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What is the overall efficiency for this production line? $($Write your answer as a percentage, and display your answer to two decimal places.$)$

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$\%$