please help me correcting this question

c-1. The following Information pertains to a project that is about to commence. Which activities would you be concerned with in terms of timely project completion? Estimated Duration (days) Activity Precedes B C D E End End GH 1 A B D E F G H I 12 6 5 End 8 9 7 14 End ES LS Slack Activity A EF 15 UF 15 15 27 33 15 0 27 0 27 0 33 0 33 0 2 O D 27 E 36 F ) OOO OOOO 10 17 17 > Activity Estimated Duration (days) 15 12 6 5 3 4 m U 0 LLL LLL D T H B Y Precedes B C, D E End End G, H I ] End K End 8 8 9 7 14 6 Activity ES LF Slack EF 15 olin A 15 x B 15 27 15 27 0 C 27 33 27 33 D 27 32 27 32 E 36 33 36 F 8 0 G 8 16 8 16 @ 8 17 00 17 HI 16 23 16 23 17 31 17 31 K 31 37 31 37 c-2. Identify the critical activities, and determine the duration of the project. The critical activities are F, H, J, and K