Jobs A$,$ B$,$ and C are in queue at work center $10$ before being

completed on work center $20.$ The following information pertains to the

jobs and the work centers: $($Job$,$ Process time $($day$)$ at WC $10,$ process

time $($day$)$ at WC $20,$ Due Date$)$: $($A$,8,6,24)$; $($B$,6,4,20)$; and $($C$,5,2,$

$22).$ For this problem, there is no move time between two centers.

Today is day $1.$ If the jobs are scheduled by earlies due date $($EDD$)$ rule

today, how many idle days from day $1$ to the day end $($the date that last

job is completed$)$ in work center $20$ will have?