need answer for d and e

QUESTION 2 A network consists of the following list. The times are estimated in weeks provided in the table below Activity Immediate Predecessor(s) Duration (Weeks) 2 B 4 3 D E ON F 1 BD BD G H 1 C GH GH E.F. KJ olon ja NA J K L a) Construct a PERT network for the project. (4 marks) b) Determine the earliest event times and latest event times for all events. (4 marks) c) Identify the critical path for the project. (2 marks) d) Determine the project completion time, (1 mark) e) Calculate total float and free float for activity C and F. (2 marks)