Problem $6-21($Algo$)$

Consider the following tasks, times, and predecessors for an assembly of set$-$top cable converter boxes:

$\backslash$table$[[$TASK ELEMENT,TIME $($MINUTES$),$PRECEDING TASKS$],[$A$,7,-],[$B$,7,$A$],[$C$,8,$B$],[$D$,7,$B$],[$E$,9,$C$,$ D$],[$F$,7,$A$],[$G$,7,$F$],[$H$,8,$G$],[$I$,7,$E$,$ H$]]$

Given a cycle time of $22$ minutes, develop two alternative layouts. Use the longest task time rule and the largest number of following tasks as a secondary criterion. What is the highest efficiency of your layout, assuming the $22-$minute cycle time?

Note: Enter your answer as a percentage rounded to $2$ decimal places.