Note on #5 and #6: When you are given 3 time estimates for each activity, it is possible to end up with decimal numbers for expected duration, for example, a = 2, m = 4, b = 8 will lead to t = (2+4*4+8)/6 = 4.333 weeks. Just work with the decimal numbers as they are, do not round them. This will cause some ES/EF/LS/LF to have decimal digits too. You may need to expand the column width in your network diagram to show these decimal digits. Supppose the estimates of activity times (in weeks) are provided for the network shown in Problm 1. a) Find expected project completion time, E(T), and its standard deviation. What is the probability the project will be completed b) within 21 weeks? c) within 22 weeks? d) within 25 weeks? State the answers rounded to 3 decimal places (e.s., 0.123). Variance Expected t 0) + Activity 3.5 Time Estimates (weeks) Optimistic Most prob Pessimistic a m b 4 5 6 2.5 3 6 7 8 5.5 9 7 9 2 3 8 10 12 6 7 14 D E F G H