Activity

Code

Time Estimate $($in days$)$

Optimistic Most Likely Pessimistic

A B $121020$

A C $101514$

B D $51015$

B E $121020$

C E $101514$

C F $121020$

D E $000$

D G $101520$

E G $101526$

F G $101514$

Required: Draw a PERT network, calculate critical path and

Find the $($ES$),($EF$),($LF$)$ and $($LS$)$ for each activity.