How many $($parallel$)$ workstations will be needed for each task? b$.$ What percentage is idle time in process of workers?$4.$ A cheese processing plant has several tasks that need to be done as listed in the following table with time for each activity and precedence relationships. The line works $5$ days a week, for $8$ hours each day. The plant provides cheese to several supermarket chains at a rate of $600$ lbs per week.$$Activity Predecessor Time $($minutes$)$ Workstation A$-$ B$$C D E F$$G H I$-$A A$$B$,$ C B$$C$$D$,$ E D$,$ F$343214243123456578$