help please

I. Identify all activities that are not part of the critical path(s) of this network. The letter associated with the correct answer is a) A-C-D-H-J b) A-B-G-I-J c) A-B-E-H-J d) C-D-E-F-H e) None of the above II. What is the length of the critical path, that is the total project duration time? The letter associated with the correct answer is a) 28 days b) 30 days c) 32 days d) 34 days e) None of the above III. What is the slack associated with activity I? The letter associated with the correct answer is a) 0 b) 4 c) 5 d) 10 e) None of the above IV. If activity D were delayed by two days, what would be the total project duration time? The letter associated with the correct answer is a) 28 days b) 30 days c) 32 days d) 34 days e) None of the above