Balance the assembly line shown below for $($a$)$ a shift output of $35$ pieces and $($b$)$ a shift output of $28$ pieces. Assume an $7-$hour shift, and use the rule: choose the assignable task with the longest processing time. Compute the line efficiency for each case.

a$.$ Fill in the table below for a shift output of $35$ pieces. Break ties by choosing the lowest task number. If your answer is zero, enter $"0".$ Round your answers to the nearest whole number.

$\backslash$table$[[$Workstation$,$Tasks,Total Time,Idle Time$],[1,-$select$-,,],[2,,,],[3,-$select$-,,],[4,,,],[,$Total,,$]]$

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