A Project Consists of Four Consecutive Tasks That Have Average

Multiple Choice

A project consists of four consecutive tasks that have average duration and worst-case duration estimates (in days) as shown in the table.Use Newbold's model to determine the aggregated one sigma buffer for this project. $$\begin{array} { | l | l | l | } \hline \text { Activity } & \text { Average } & \text { Worst-Case } \\\hline A & 10 & 20 \\\hline B & 15 & 25 \\\hline \text { C } & 20 & 30 \\\hline D & 25 & 35 \\\hline\end{array}$$

A) 20 days
B) 10 days
C) 15 days
D) 5 days