Please help me solve 4-9

Activity X Management Immediate Time Estimates Predecessor Weeks) 2-4-6 6-8-10 7-9-12 2-3-5 B B 6 F 6 B SMO K 3-4-8 5-7.9 2-2-3 2-3-6 3-4-5 4-5-8 5-8-12 1-1-1 6-7-11 8-9-13 M N UEZ M END H,G,KO 1. Draw the network diagram (see answer on next page) 2. What are the estimated expected/mean times for each activity? Round to two decimal places A=4; B=2.17; C=8.17; D=8;E=9.17; F=4.5; G=7; H=3,17; I=3.33; 1=4; K=5.33; M=1; N=7.5; O=9.5 3. Identify the critical path and the mean time for project completion. C-M-N-O; MEAN COMPLETION TIME FOR THE PROJECT = 26.17 WEEKS 8.17 +1 +7.5+4.5 = avril 4. What are the estimated slack times (in weeks) for activities a, d, i, and m? A=1.83; D=1.83; 1=11.34; M=0 5. What is the variance for each activity? Round to two decimal places A=.44; B=.03; C=1.36; D=.44; E=.69; F=.69; G=.44; H= 25; 1=.44; J=.11; K=.44; M=0; N=.69;O=.69 6. What is the standard deviation for each activity? Round to two decimal places A=66; B=,17; C=1.17; D=66; E=.83; F=.83; G=.66; H= 50; 15.66; J=.33; K=.66; M=0; N=.83;O=.8 7. What is the standard deviation for the critical path? Round to two decimal places C-M-N-O= 1.82 8. What is the probability that this project will be completed within 28 weeks? There is an 84.38% chance the project will be completed within 28 weeks. 9. What is the probability that this project will not be completed within 28 weeks? There is a 15.62% chance the project will not be completed within 28 weeks