3.11Dave Fletcher (see Problem 3.10) was able to determinethe activity times for constructing his laser scanningmachine. Fletcher would like to determine ES, EF, LS, LF, andslack for each activity. The total project completion time andthe critical path should also be determined. Here are the activitytimes:ACTIVITY TIME (WEEKS) ACTIVITY TIME (WEEKS) (letter is activity and number is time)A6       E 4B 7       F 6C 3      G 10D 2       H 73.17Bill Fennema, president of Fennema Hospitality, hasdeveloped the tasks, durations, and predecessor relationships inthe following table for building new motels. Draw the AON networkand answer the questions that follow.Activity   predecessor optimistic       Most       pessimisticlikely       OPTIMISTICMOSTLIKELY PESSIMISTICA        —      4       8        10B       A        2       8         24C       A        8      12       16D       A        4       6         10E       B         1      2         3F       E,C      6       8        20G     E, C     2      3         4H       F          2      2         2I        F          6      6         6J      D,G,H    4     6        12K      I,J         2      2        3c) Based on the calculation of estimated times, what is the criticalpath?d) What is the estimated time of the critical path?e) What is the activity variance along the critical path?f) What is the probability of completion of the project beforeweek 36?to be completed in excel on seperate pages