Consider the following data for a project to install a new server at the Northland Pines High School: ol Activity Time (days) Immediate Predecessor(s) Activity A 1 B 5 A 3 A 3 B D E F 1 B 5 G H 1 3 2 B,C DE F F G, H, I 5 J 5 a. Choose the correct network diagram below. OA OB Q SI S OD S b. Calculate the critical path for this project. The critical path is A-B-F-I-J and the project duration is 21 days. (Enter your response as a whole number.) c. How much slack is in each of the activities G, H, and I? Activity Activity Time (days) On critical path? Slack (days) G 3 H 2 1 5