1. Which path(s) is/are the critical path(s) if activities B and D increase by 2 days while activity I decreases by 1 day?

   1. A-C-E-H-I
   2. A-C-E-F
   3. B-D-E-H-I
   4. B-D-G

   	A.	Only iv
   	B.	i and ii
   	C.	i and iv
   	D.	ii and iv
   	E.	iii and iv

Please explain.

Immediate Predecessor(s) A (5) H (2) Duration (days) 5 1(3) Activity ES EF LS LF Slack A C (5) B 2 C A,B 5 E (5) D START 7 B F (3) E CD 5 F. E 3 FINISH G D 9 B (2) H E 2 D (7) | H 3 G (9) Completion time days Duration Paths: A-C-E-H-1