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3. For the following activities in an important project: Activity Immed. Pred Time (weeks) 5 10 A B A A 8 6 B C D E F G 7 B, C C E and F 4 4 a. Determine the critical path and the earliest completion time, in weeks, for the project. b. For the data shown below, reduce the project completion time by three weeks. Assume a linear cost per week shortened and show, step by step, how you arrive at your schedule. Activity Normal Time Crash Normal Time Cost Crash Cost A 3 5 10 B 7 8 7 D 6 5 $7,000 $13,000 12,000 18,000 5,000 7,000 4,000 5,000 3,000 6,000 6,000 7,000 7,000 9,000 E 7 6 Tim 4 3 F G 4 3