Data for Problems 13-17. The network for a project (a CPM model) is given below. The numbers on the arcs represent the activity times (in days). Copyt network diagram on a piece of paper and perform the FORWARD PASS and the BACKWARD PASS procedures to compute the early times and the late time fill in the square blanks on the arcs with the slack times of the activities. Then answer questions 13-17. 1 2 What is the project completion time? O 13 days O 14 days O 15 days O 16 days For activity 4-5, the early start and the early finish times are O ES = 8, EF = 9 O ES = 9, EF = 10 ES = 10, EF = 11 O ES = 11, EF = 12 For activity 1-3, the late start and the late finish times are OLS = 0, LF = 4 OLS = 2, LF = 6 O LS = 3, LF = 7 OLS = 4, LF = 8 The critical path is O 1-2-4-5-6 O 1-3-4-5-6 O 1-3-4-6 O 1-2-4-6 What is the slack time for activity 3-4? O 1 days O 2 days O 3 days 4 days