Give thorough explanation on how to solve ES, EF, IS, IF, and slack time specially the ES.
 

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McGee Carpet and Trim installs carpet in commercial offices. Andrea McGee has been very concerned with the amount of time it took to complete several recent jobs. Some of her workers are very unreliable. A list of activities and their optimistic completion time, the most likely completion time, and the pessimistic completion time (all in days) for a new contract are given in the following table. Time (days) Activity a m b Immediate Predecessor(s) Time (days) Activity a m b Immediate Predecessor(s) A 2 6 9 G 2 3 4 A. E B 4 5 6 H 5 7 9 F C 2 3 4 11 12 13 G D 6 7 8 C J 13 15 17 C E 3 5 7 B. D K 3 7 11 H.I F 5 10 14 A. E This exercise contains only parts b, c, and d. b) Determine the total project completion time and the critical path for the project. The critical path for the project is C-D-E-F-H-K. The total project completion time is 38.83 days. (Round your response to two decimal places.) c) Determine earliest start (ES), earliest finish (EF), latest start (LS), latest finish (LF), and slack for each activity. For each activity the ES, EF, LS, LF, and slack are as follows: (Round your responses to two decimal places.) McGee Carpet and Trim installs carpet in commercial offices. Andrea McGee has been very concerned with the amount of time it took to complete several recent jobs. Some of her workers are very unreliable. A list of activities and their optimistic completion time, the most likely completion time, and the pessimistic completion time (all in days) for a new contract are given in the following table. Time (days) Activity a m b Immediate Predecessor(s) Time (days) Activity a m b Immediate Predecessor(s) A 2 6 9 G 2 3 4 A. E B 4 5 6 H 5 7 9 F C 2 3 4 11 12 13 G D 6 7 8 C J 13 15 17 C E 3 5 7 B. D K 3 7 11 H.I F 5 10 14 A. E This exercise contains only parts b, c, and d. b) Determine the total project completion time and the critical path for the project. The critical path for the project is C-D-E-F-H-K. The total project completion time is 38.83 days. (Round your response to two decimal places.) c) Determine earliest start (ES), earliest finish (EF), latest start (LS), latest finish (LF), and slack for each activity. For each activity the ES, EF, LS, LF, and slack are as follows: (Round your responses to two decimal places.)