please help!

Consider the network described in the table below. Summarize your answers in the table below. Show all your work othenvise no credit given. Ten points (network 2 points, part a+b-6 points, part c-2 points). If using software as evidence of your work please provide relevant software output data. Due on paper and uploaded to Canvas a. Calculate the expected duration of each activity. b. Calculate the expected duration and variance of the critical path. c. Calculate the probability that the project will be completed in fewer than 30 time units. ANSWBRS