Given the List of Activities,the Expected Time Estimates,and Variances,compute the Probability

Multiple Choice

Given the list of activities,the expected time estimates,and variances,compute the probability that the project time will be less than 30 minutes.Round Z to two decimals.
$\begin{array}{ll}\text { Activity } & \mathrm{T}_{e} \text { (minutes) }&\text { Variance } \\\text { A } & 2.00&0.5 \\\text { B } & 6.17&1.75 \\\text { C } & 8.34&1.45 \\\text { D } & 10.05&3.00\end{array}$

A) 0.6950
B) 0.7500
C) 0.8907
D) 0.9082
E) 0.9989