question 6 and 7

6. Consider the project network below. Suppose the duration of both activities A and D can be reduced to 1 day, at a cost of$15 per day of reduction. Also, activ-a ities EI G, and H can be reduced in duration by 1 day, at a cost of$25 per day ofreduction. What is the least cost approach to crash the project by 2 days? 'What is the shortest \"crashed" duration, the new critical path, and the cost of crashing? 7. The network for shooting a TV commercial as shown in the table has a fixed cost of $90 per day. but money can be saved by shortening the project duration. Find the leastacost schedule. Cost Increase (19-1. Normal Crash 2nd, Activity Time Time 3rd day} 12: Contract personnel ? 4 $30, 50, TD 23: Obtain stage props 9 6 4D. 45, 65 13: Rent equipment 12 10 60, 60 21: Contract studio 11 9 35, 60 31: Set time and date 3 3