please answer full questions

Consider the following data for a project to install a new server at the Northland Pines High School: Activity Activity Time (days) Immediate Predecessor(s) A 3 4 D A . 3 A D 4 B B E 1 5 O OWO I 7 B, C D, E 3 G H 4 3 J 7 GHT a. Choose the correct network diagram below. OA. B. Q Q B IF u 9 OD OC. la low SH OD. OC. @ D Q E G b. Calculate the critical path for this project. The critical path is A-C-F-H-J and the project duration is 24 days (Enter your response as a whole number.) c. How much slack is in each of the activities G H and 1? Activity Activity Time (days) On critical path? Slack (days) 3 G INo 3 4 Yes 0 3 1 No 8