Dave Fletcher was able 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: Time Activity (weeks) Immediate Predecessors) Time (weeks) Immediate Predecessor(s) Activity B 8 F 7 G 9 CE D. D 2 8 Dave's earliest start (ES) and earliest finish (EF) are Activity ES EF B 0 C 9 D E 12 O O DI F 21 H 23 Dave's latest start (LS) and latest finish (LF) are: Activity LS 15 G 14 F 8 E 10 D 13 11 B 0 A 5 The slack times are: Activity Slack B C B-E-G D E A-D-H F B-F-H A-C-G H The activities on the critical path are