QUESTION 1 Suppose the mean absolute deviation of the forecast errors is 10. Calculate the safety stock to achieve 90% type I service level target. (NORM.INV(0.9, 0, 1)=1.281. Standard Error = 1.25*MAD) 16.01 20.01 24.01 None of the above QUESTION 1 Suppose the mean absolute deviation of the forecast errors is 10. Calculate the safety stock to achieve 90% type I service level target. (NORM.INV(0.9, 0, 1)=1.281. Standard Error = 1.25*MAD) 16.01 20.01 24.01 None of the above