Please show steps for Question B and C.

The following are the precedence requirements, normal and crash activity times, and normal and crash costs for a construction project Activity Precedence Normal activities time in weeks Normal Crash Cost in cost in rands rands A B C D E F G H A A B,C BD DF E,G 5 4 2 5 1 3 4 Crash Time in weeks cost 3 2 1 2 1 2 1 2 8000 7 000 5 000 9 000 8 000 6 000 10 000 9 500 10 000 8 000 6 000 12 000 10 000 8 000 22 000 11 000 4 (a) Construct the project network for the above activities. (b) Perform a forward and backward pass and hence find the project completion time and the critical path(s). (c) Find the total float of all the activities and hence determine activities which can be delayed without affecting the project completion time