The Pickett Marketing Firm is developing a new Web$-$based media campaign

for a client. The following table describes the relationships between the activities that need to be completed.

Activity Immediate Predecessors Time $($days$)$

A $4$

B A $6$

C B $12$

D B $11$

E D $9$

F D $8$

G D $10$

H C $5$

I C $7$

J E$,$ F$,$ G $4$

K H$,$ I $9$

$($a$)$ Develop a project network for this problem.

$($b$)$ Determine the EST, EFT, LST$,$ LFT$,$ and slack for each activity. Also determine the total project completion time and the critical path$($s$).$