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(b) Suppose the plant manager at Rainbow Manufacturing has been given only 13 weeks (instead of 16 weeks) to install the new pollution control equipment. As you recall, the length of Williams's critical path was 15 weeks, but he must now complete the project in 13 weeks. William needs to determine which activities to crash, and by how much, to meet this 13- week due date. Naturally, Williams is interested in speeding up the project by 2 weeks, at the least additional cost. Activity Critical Path Yes A B D E Time (Weeks) Normal Crash 2 1 3 1 2 1 4 3 4 2 Cost(c) Normal Crash 42,000 42,750 50,000 54,000 66,000 67,000 78,000 79,000 86,000 88,000 No Yes No Yes Using the current activity time from the table above, compute the crash cost per week for each of the activity starting from Activity A,B,C,D and E