Use the information given in the following table to crash the project. It would help you if you draw the network diagram first. You need to determine which activities should be crashed and the total cost of crashing if the goal is to shorten the project by three weeks as cheaply as possible. After you are done with crashing the project, answer the following questions:

Activity	Duration (weeks)	Cost of First Crash	Cost of Second Crash
1-2	5	8	10
2-4	6	7	9
4-7	3	14	15
1-3	3	9	11
3-4	7	8	9
1-5	5	10	15
5-6	5	11	13
6-7	5	12	14

a. In the first crash, what is the cost of the crash? (e.g. if it is $20, put just the number 20 without the dollar sign)

b. In the second crash, what is the total cost of the crash? (e.g. if it is $20, put just the number 20 without the dollar sign)

c. In the third crash, what is the total cost of the crash? (e.g. if it is $20, put just the number 20 without the dollar sign)

d. In the third crash, how many critical paths there are in the project?

e. In the third crash, among all the activities that you crash in that round, one of them is the least costly! What is the cost of crashing that activity in that round of crashing? (e.g. if the cost is $20, then put 20 without the dollar sign)