Problem 4 (15 Points). The complete diagram for the following PERT problem is shown below. a. Calculate the expected times and variances in the above table. b. Draw a network and determine the critical path based on the expected completion times. c. What is the expected completion time of the project, ? What is the total variance with critical path of the project, 2 What is the standard deviation with critical path of the projeat, i. Less than 42 weeks ii. Greater than 35 weeks iii. Between 42 to 44 weeks iii. Greater than 40 weeks