Q.4. Solve the following problem using the following data: Predecessor Task A B A A B D,E D,E,F D, E, F, G H, I, J ta 1 2 1 4 3 10 5 2 1 2 3 tm 2 5 3 10 7 15 9 3 4 5 3 tb 9 8 5 25 12 25 14 7 6 10 3 H I J K a. Draw a pert Diagram b. Compute Expected completion times for all tasks c. Find the critical path and the expected completion time d. What is the completion time that gives you 75% chance of success