Question 6 10 points Save Answer Question Wording: Given: Mean = [P + 4(L) + 0]/6 One Standard deviation = (P - 0]/6 Normal Distribution: +/- 1 Standard Deviation = 68.3% of all possible values. +/- 2 Standard Deviation = 95.4% of all possible values. +/- 3 Standard Deviation = 99.7% of all possible values. Given the following information: To create a software program pessimistically it takes 500 days, optimistically it takes 160 days and most likely it would take 240 days. What is the upper two standard deviation estimate (95% confidence)? O a. 113.33 O b. 56.66 O c. 50 O d. 20 A Moving to another question will save this response. >