Using the following project information, calculate the variance for each of the project activities.   Activity   Optimistic Time Estimate(weeks)   Most Likely Time Estimates (weeks)   Pessimistic Time Estimates (weeks)   Immediate Predecessor(s) A   2   3   5   none B   2.5   4   5   A C   5   7   8   A D   3   5   7   B,C E   4   7   14   B,C F   2   5   8   D G   4   5   6   E H   6   6   8   F I   4   8   10   G J   2   3   3   H,I   (Round your answers to 2 decimal places, e.g. 1.75.)   Activity Variance A enter a variance rounded to 2 decimal places B enter a variance rounded to 2 decimal places C enter a variance rounded to 2 decimal places D enter a variance rounded to 2 decimal places E enter a variance rounded to 2 decimal places F enter a variance rounded to 2 decimal places G enter a variance rounded to 2 decimal places H enter a variance rounded to 2 decimal places I enter a variance rounded to 2 decimal places J enter a variance rounded to 2 decimal places

please help and solve correctly..will give upvote if right

A paint company has three sources for buying bright red pigment for its paints: Vietnam, Taiwan, and Thailand. Unfortunately, the pigment is made from a bush whose annual growth is heavily dependent upon the amount of rainfall during the growing season. The following tables show probabilities and prices for wet, dry, and normal growing seasons. Probabilities Wet Dry Normal Vietnam 0.5 0.2 Taiwan 0.6 0.3 Thailand 0.4 0.4 Price/Pound ($) Vietnam 0.96 1.11 Taiwan 0.86 1.25 Wet Dry Normal Thailand 0.92 1.19 0.3 What country shoul the company select? Thailand Taiwan Vietnam 0.1 0.2 1.05 0.99 1.06 What is the expected value (price) associated with it?

Please help with (b) and (c) as both answers given were incorrect! Please need correct answers. Blue Lagoon is a contractor that installs residential swimming pools, projects that consist of nine major activities. The activities, their immediate predecessors, and the activity time estimates (in days) are shown. Activity Immediate Predecessor Optimistic Most Probable Pessimistic A   3 5 6 B   2 4 6 C A, B 6 7 8 D A, B 8 10 11 E B 2 4 6 F C 1 2 3 G D 6 10 12 H D, F 7 9 11 I E, G, H 3 4 5 (a) What are the critical activities? (Enter your answers as a comma-separated list.) $$A, D, G, I       (b) What is the expected time (in days) to complete the project? (Round your answer to two decimal places.) (c) Based only on the critical path, what is the estimated probability that the project can be completed in 28 or fewer days? (Round your answer to four decimal places.)