A project consists of the following activities, normal durations (days), immediate predecessors, costs per day to crash

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A project consists of the following activities, normal durations(days), immediate predecessors, costs per day to crash ($000/day),and available days to crash.
Activity
Normal time (days)
Crash time
Immediate Predecessor(s)
Cost per Day to Crash
A
8
5
---
8
B
8
4
---
2
C
9
5
A
6
D
10
6
A
3
E
14
9
C, D
7
F
4
2
B, D
7
G
12
6
F
8
a. Draw a network diagram, calculate Early Start, Early Finish,Late Start, and Late Finish times. What is the slack of eachactivity? What is the critical path and its duration? (8points)
b. Determine the minimum-cost crashing plan that willtake 5 days off the projectduration. What is the total cost of crashing for your plan?Show your work. (8 points)
c. If activity B is delayed by 10 time units, what would happento the project duration (look at the original network diagram youhave created in part a)? (2 points)
d. If activity C is delayed by 5 time units, what would happento the project duration (look at the original network diagram youhave created in part a)? (2 points)