please include slack times

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: Time Activity (weeks) 7 B 6 C 4 D 1 Immediate Time Predecessor(s) Activity (weeks) E 4 F 6 A G 10 A H 6 Immediate Predecessor(s) B B CE DF Dave's earliest start (ES) and earliest finish (EF) are: ES EF Activity A 7 0 11 7 Dm De One 10 6 G 21 18 Dave's latest start (LS) and latest finish (LF) are: LS LF Activity H 15 G 11 F 9 E 7 D 14 7 B 1 0 The slack times are: Activity Slack N