Calculate the expected project duration and its standard deviation for the construction project that consists of the following activities: Activity A B C D E F G Expected Duration (days) 3 3 9 6 5 9 9 Standard Deviation (days) 2 4 3 3 4 6 4 D F Start B E End O Z Probability Probability Z -2.0 0.02 -13 -1.0 -0.9 -0.8 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 0.1 0 0.07 0.10 0.16 0.18 0.21 0.24 0.27 0.31 0.34 0.38 0.42 0.46 0.50 0.98 0.93 0.90 0.84 0.82 0.79 0.76 0.73 0.69 0.66 0.62 0.58 0.54 0.50 +2,0 +1.5 +13 +1.0 +0.9 +0.8 +0.7 +0,6 +0.5 +0.4 +0.3 +0.2 +0.1 0 1) Expected Project Duration (1 Point) 2) Standard Deviation of Project Duration = (1 Point) 3) In a range estimating problem, it was found that the expected project cost is $5,000,000 and the standard deviation of the project cost = $100,000. For this project, 3a) Find the probability that the project cost will be between $4,850,000 and $5,200,000. (2 points) 3b) The project cost that provides 90% probability of not being exceeded. (2 points)