looking for some guidance on how to complete this

A few years ago, the University of Maine created a traffic circle at the corner of Rangeley road and Park Street. The complexity and uniqueness of this project made it necessary to create a project management chart, identifying the necessary tasks, plan, schedule, and control this operation. Thus, a PERT model was utilized. Given the information in Table 3.1 below, complete the following. Description 18) Computing the expected time, and variance for each activity. Cutting back tres Moving the car 7 Wear La Pred 12 18 36 B 10 55 Dhima Grading the road 20 30 70 D Installing drainage 30 50 100 19) Draw the Critical Path Diagram on the next page. 15 E Creating the traie circle B 25 35 25 F Laying the cars CE $ 15 35 GFusal Grading of the reada DF 10 35 75 Asphalting the new area G 10 25 70 20) Compute the total completion time, and path variance. H I 20 40 40 60 44.4 Second Coat of Asphalt Replacing the , 3 10 IS K Inspection 10 20 60 Linal Detail work cleanup 1 20 25 60 21) Compute the probability of completion 255 days or less. Critical Park Tool Time Critical Park Tanel Prince & Sandard Deviction Project incel per: 22) Compute the probability of completion in Probabili f 255 or les 260 days or Pebble of 260 er mere ALDE See and are 23) Determine the task most likely to delay project completion. Why