(Solved): (a) Consider the network diagram which consists of the following activities. Calculate the followi ...

(a) Consider the network diagram which consists of the following activities. Calculate the following time estimates for each activity. \[ \begin{array}{ll} \boldsymbol{n} & \text { Earlieat Start Time(EST) } \\ \boldsymbol{n} & \text { Earlieat Finish Time(EFT) } \\ \boldsymbol{n} & \text { Latest Start Time(LST) } \\ \boldsymbol{n} & \text { Latest Finish Time(LFT) } \end{array} \] (b) The time estimates for the activity of the PERT diagram are given in the table below. Calculate the expected time, variance and standard deviation for each activity