2. A project has seven activities. Partial crashing is available. Normal Crash Normal Time Cost Time (weeks) ($) (weeks) 4 3,000 3 9 5,000 7 4 7,000 4 6 6,000 4 8 4,000 3 4,000 4 2,000 Activity A B C D E F G Immediate Predecessors none A A B, C C D E, F 622 Crash Cost ($) 5,000 8,000 7,000 8,000 8,000 9,000 7.000 asilo MO oaO MOM Maximum Weeks Reduced 1 2 0 2 2 1 2 (a) What is the expected project completion time? (b) What is the critical path? (c) What activities should be crashed and how much will they cost to reduce the completion time of the project by three weeks?