Need help to solve this and thanks in advance

Assignment 2 1. Given the following network diagram: (boxes show task + duration: ex A16 is task A with a duration of 16) A 16 B3 C7 D3 Start E2 F 5 G9 H 10 Finish 16 J4 K1 a. List all the paths through the network and their durations. b. List the slack for each activity in the network. c. Indicate the critical path for the network. 2. Using the following information Activity Optimistic Most Likely Pessimistic Predecessors Time Time Time A. Problem Analysis 5 9 13 B. Requirements Determination 1 2 9 C. Process Requirements Analysis 2 3 16 B D. Data Requirements Analysis 2 4 18 B E. Database Design 3 4 11 D F. Interface Design 1 4 7 C D G. Program Design 3 4 5 E, F H. Programming 2 4 12 G I. Testing 4 7 9 . a. For each activity calculate: Expected duration using the PERT calculation (duration to be used in the calculating CP) Standard deviation Variance b. What is the expected total time for the project? c. What is the ES, LS, EF, LF for each task? d. What is the slack for each task? What tasks are on the critical path? e. 3. Determine the Early Completion Time, Late Completion Time, Slack, and whether this task is on the critical path (begin at time = 0). + Task Duration Slack Preceding Event Early Finish Late Finish On Critical Path? A 3 B A 5 A 7 D 6 E B, C 3 F D 2 G 5 E, F 5