Exhibit 15 -Refer to Exhibit 15

Exhibit 15.6
The following questions use the information below.
Consider the CPM network for the following set of activities:
$\begin{array}{cc}\text { Activity } & \text { Predecessor Activities } \\\hline \text { A } & \cdots \\\text { B } & \text { A } \\\text { C } & \text { A,B } \\\text { D } & \text { A,B } \\\text { E } & \text { A,B,C } \\\text { F } & \text { A,B,C } \\\text { G } & \text { A,B,C,D } \\\text { H } & \text { A,B,D } \\\text { I } & \text { A,B,C,D,FG }\end{array}$

-Refer to Exhibit 15.6. Modify the table above by completing the following table. For column 3, list only the immediate predecessors for each activity.
$\begin{array}{ccc}\text { Activity } & \text { Predecessor Activities } & \text { Immediate Predecessors } \\\hline \text { A } & \cdots & -- \\\text { B } & \text { A } & \text { A } \\\text { C } & \text { A,B } & \text { B } \\\text { D } & \text { A,B } & \text { B } \\\text { E } & \text { A,B,C } & \\\text { F } & \text { A,B,C } & \\\text { G } & \text { A, B,C,D } & \\\text { H } & \text { A,B,D } & \\\text { I } & \text { A,B,C,D.FG } &\end{array}$