6. [30 points] Consider following project. Activity Immediate Predecessor Activity Time (weeks) Number of workers reqd. A B 4 3 2 1 C 3 3 D B, C 4 2 E A 4 1 F D 3 3 a. Draw a project network. If you draw on a paper, scan it and insert it to the document with answers. Images submitted separately will not be graded. b. Develop resource requirement plan (similar to figure 6.5, 6.7). See presentation slide 10 for an example. c. Assume that each task can be performed independently of the other tasks. (No predecessor relationships). Now, do a resource leveling. How many workers are required? What is the project completion time? Show all work to earn credit. d. Assume that each task can be performed independently of the other tasks. But now, you have only 3 workers available at any given time. Perform resource-limited scheduling. What is the new completion time for the project? Show all work to earn credit.