Exercise $3$Projet Scheduling

Consider the following project schedule

$($a$)$ Draw a Gantt chart for the above project schedule.

$($b$)$ Draw a PERT diagram for the above project schedule.

$($c$)$ What is the earliest completion time for the project? What is the Slack Time of each task? What is the

critical path of the project?

$($d$)$ What would happen to the project if task F was delayed by $4$ weeks?