answer D mostly

must be neat and clean

QUESTION 1 To complete the rotor assembly for an experimental spacecraft, Gilbert has laid out nine major activities involved. These activities have been labelled A to in the table below, which also shows their estimated completion times in weeks) and their immediate predecessors. EVENTS AND ACTIVITIES FOR ROTOR ASSEMBLY Times (in weeks) Preceding Event Activities a m b 1 2 3 B 2 3 4 4 5 A 6 D 8 A 9 10 E 2 5 8 F B 4 5 6 G B, C 1 2 3 H FD 1 3 5 EF ! 2 4 6 Key: a is optimist time, m is the most likely time and b is the pessimistic time. HG - Immo i. Calculate the expected time for each activity ii. Draw a Gantt Chart from the same information above