plesse help me figure this problem out. ive really been stuggling

Given the project within the table below, calculate the following: Activity Predecessor Time (days) A 2.5 B 3.7 C 7.5 D 8.8 E AC D B, E 10 4.2 F G F. 9.7 H G 11.5 a. What is the project length? (Select) b. What activities are on the critical path? Select] c. How much slack is in activity A? (Select] and activity G? Select] d. What is the Late Start / Late Finish for activity E? [Select] e. What would happen to the overall project length if activity A was delayed by 6 days, now taking a total of 8.5 days? Select)