A simple CPM network has three activities, A, B, and C.A is an immediate predecessor of B and of C. B is an immediate predecessor of C. The activity durations are A=4, B=3, C=8.

a. The critical path is A-B-C, duration 13.5

b. The critical path is A-C, duration 12.

c. The critical path cannot be determined without knowing PERT expected activity times.

d. The network has no critical path

e. The critical path is A-B-C, duration 15

Given an actual demand of 61, a previous forecast of 58, and an of .3, what would the forecast for the next period be using simple exponential smoothing?

a. 58.9

b. 57

c. 61

d. 61.5

e. 45.5

Please please, I don't have enough time to help me