Activities K, M, and S immediately follow activity H, and their latest start times are 14, 18, and 11. The latest finish time for activity H a. is 11. b. is 14. c. is 18. d. Cannot be determined.

a) 11

Step-by-step explanation:

Since activity H came before all other activities, we can discard 14 and 18 as possible answers. Also the exercise tells us that all those activities came immediately after activity H, that means that activity H finishes right before the first activity from K, M and S starts. This means that activity H should end at 11, because that is the start time for the first activity.