Part C please

The estimated times and immediate the act scanning company are given in the following table. Assume that the activity times are independent. te predecessors for the activities in a project at Howard Umrah's retinal Time (weeks) Immediate Time (wooks) Immediate Activity a m b Predecessor(s) Activity am bPredecessors) 7 10 12 4 11 18 10 12 10 12 This exercise contains only parts a, b, c, d, and e. a) Based on the activity time estimates, the expected times and variance for each of the activities are (round your response to two decimal places): Expected Time Variance 0.70 5.4 0.70 1.7 Activity 9.8 9.8 9.4 b) The expected completion time of the critical path 20.4 weeks (round your response to two decimal places)