What is the latest start (LS) and lastes finish (LF) for H-A? What are the slack times? What activities on the critical path?

Dave Fletcher was able to dotermine the activity times for constructing his laser scanning machine. Fletcher would like to determine ES, EF, LS, LF slack for each activity. The total project completion time and the criticai path should also be determined. Hore are the activity times. Dave's earliest start (ES) and earliest finish (EF) are: Dave's latest start (LS) and latest finish (LF) are