Question $8(2$ points$)$

Given the following line balance data:

$\backslash$table$[[$TASK$,$PREDECESSOR,TIME$($seconds$)],[T,-,15],[U,T,14],[V,T,7],[W,U,6],[x,V,8],[Y,W,x,10],[Z,Y,21]]$

For eight hours of operating time per day and a desired output rate of $960$ units per day, what is the efficiency for the balance which uses the minimum number of stations?

$90\%$

$75\%$

$98\%$

$82\%$

$86\%$