Question 5 Time Cost Model The following table describes a consulting project. Activity Preceding Activities Normal Required Time (Week) Crash Required Time (Week) Total Normal Cost in HKD Total Crash Cost in HKD A 2 1 1,000 4,200 B A 5 2 2,000 5,600 A 4 2 2,000 5,200 D B 4 2 3,000 5,000 E 3 1 1,500 2,500 F B, C 5 3 4,000 7,600 G D, E, F 3 1 3,000 10,000 (a) What is/are the critical path(s) and the estimated completion time? (b) Suppose there is 3,000 HKD saving for each week shorter than the estimated completion time of the project. Which tasks would be shortened in the optimal solution