QUESTION 9 Chapter 17, problem 15 Based on given information, which task will be the first to crash if you need to shorten project duration? 09-12 O 6-10 7-11 0 2-5 QUESTION 10 Chapter 17, problem 15 To minimize the cost, how many weeks should we crash? O 3 04 O 5 O 6 15. A construction project has indirect costs totaling $40,000 per week. Major activities in the project and their expected times in weeks are shown in this precedence diagram. 7 7 5 11 8 5 8 13 5 12 9 12 4 6 9 3 3 12 9 4 6 10 Crashing costs for each activity are: CRASHING COSTS ($000) Activity First Week Second Week Third Week $ - 25 35 24 30 15 30 12 $22 25 30 20 33 24 36 26 1-2 2-5 5-7 7-11 11-13 1-3 3-8 8-11 3-9 9-12 12-13 1-4 4-6 6-10 10-12 40 40 3 10 40 12 10 2 7 25 26 10 8 5 14 15 13 12 15 a. Determine the optimum time-cost crashing plan. b. Plot the total-cost curve that describes the least expensive crashing schedule that will reduce the project length by six weeks