Problem 1 Create the project network diagram. Calculate the early, late, and slack times for each activity. Identify the critical path. ID Duration Predecessor(s) A 5 10 A 15 A 5 B-fs + 5 C-sf + 20 E 20 B D-ff + 25 F 15 D E-ff + 0 G 10 C-fs + 10 H 20 F G-ff + 10