Please help me complete D-H & determine the critical path, project duration

Problem 3.15 is 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 als be determined. Here are the activity times: Immediate Predecessor(s) Time Activity (weeks) A 5 7 3 1 Immediate Predecessor(s) B Activity E F Time (weeks) 5 5 9 7 - A CE DF A H Dave's earliest start (ES) and earliest finish (EF) are: ES Activity EF 5 0 B 0 7 5 8 D 5 I Enter your answer in the answer box and then click Check Answer 22 parts remaining Clear All Check