answer questions a,b,cshow calculation step

re. (Ans: 0.2367) 6.26 A housing development firm is concerned with the times it takes to complete its projects. The fact that several of its projects have been delayed has not helped its reputation as a reliable developer. The firm intends to keep a tight control on its next project. The next project has been broken into a number of activities. The list of activities together with their optimistic times (a), pessimistic times (b) and most likely times (m) is given in the following table. Time (in weeks) Activity Predecessors a m 1, J 3 2 3 I , J 6 10 14 B 14 1 2 X C - I Q T M O O W D A K. F 1 00 0) 00 O N + 8 B E, H (a) Determine the expected completion time and variance for each activity. (b) Construct a network diagram for this project and determine the critical path. (Ans: BHICKG, 36.33 weeks) (c) For each activity, determine the earliest start time, latest start time and total float