Need help with Part C. How to compute the late start, the late completion, and the slack time for each activity of dependency matrix?

Graph visually depicting evolution of project:

Critical path is 1 - 3 - 6 - 8 - 9 - 10

Part C:

Consider the dependency matrix and the activity durations provided below. Upstream Activity 3 4 5 6 7 1 2 8 9 10 X x 1 2 3 Downstream 4 Activity 5 6 7 8 9 10 X X X 00 Activity Time 1 15 2 14 3 18 4 15 5 1 6 22 7 14 8 17 9 16 10 2 10 7 1 3 6 8 c. For each activity, compute the late start, the late completion, and the slack time. Latest Completion Time Latest Start Time Slack time 1 2 3 4 5 6 7 8 9 10