A project for improving a billing process has the following precedence relationships and activity times: a. Choose the correct network diagram below. b. Calculate the slack for each activity. Which activities are on the critical path? The critical path is path and the project duration is 22 weeks. (Enter your response as an integer.) Employee A helps Employee B will result in Activity G increasing its time by one week and Activity F reducing its time by one week. How many weeks should Employee A work on Activity F? Employee A should work weeks on Activity F and the project's duration will be reduced to weeks. (Enter your responses as integers.)