Problem 3.15 Question Help Dave Fletcher was able to determine the activity times for constructing his laser scanning machine. Fletcher would like to determine ES, EF, LS, LF, and slack for each activity. The total project completion time and the critical path should also be determined. Here are the activity times: Immediate Predecessor(s) Time Activity (weeks) A 6 B 6 4 3 Time Activity (weeks) E 5 F 7 G 10 . 6 Immediate Predecessor(s) B B C, E D, F A . Dave's earliest start (ES) and earliest finish (EF) are: Activity A ES 0 EF 5 B 0 8 5 5 D 6 E 8 13 F 8 15 G 15 23 H 13 21 Activity LF LS 17 23 I U 13 23 F 10 17 E 8 13 D 16 17 10 13 B 0 A 5 1101 The slack times are: Slack Activity A B ) E G Enter your answer in each of the answer boxes. critical path total project time