Balance the assembly line shown below for $($a$)$ a shift output of $60$ pieces and $($b$)$ a shift output of $48$ pieces. Assume an $8-$hour shift, and use the rule: choose the assignable task with the longest processing time. Compute the line efficiency for each case.

Fill in the table below for a shift output of $60$ pieces. Break ties by choosing the lowest task number. If your answer is zero, enter What is the assembly$-$line efficiency? Round your answer to one decimal place.

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What is the assembly$-$line efficiency? Round your answer to one decimal place."$0".$ Round your answers to the nearest whole number.

Workstation Tasks Total Time Idle Time

$1$

$-$Select$-$

$2$

$-$Select$-$

$3$

$-$Select$-$

$4$

$-$Select$-$

Total

What is the assembly$-$line efficiency? Round your answer to one decimal place.

$\%$

Fill in the table below for a shift output of $48$ pieces. Break ties by choosing the lowest task number. If your answer is zero, enter $"0".$ Round your answers to the nearest whole number.

Workstation Tasks Total Time Idle Time

$1$

$-$Select$-$

$2$

$-$Select$-$

$3$

$-$Select$-$

Total

What is the assembly$-$line efficiency? Round your answer to one decimal place.

$\%$