Given the Following Information for a Project, What Are the Estimated

Given the following information for a project, what are the estimated slack times (in weeks) for activities A-H?
$$\begin{array} { | c | c | c | } \hline \text { Activity } & \begin{array} { c } \text { Immediate } \\\text { Processor }\end{array} & \begin{array} { c } \text { Activity Time } \\\text { (days) }\end{array} \\\hline \text { A } & - & 6 \\\hline \text { B } & - & 8 \\\hline \text { C } & \text { A, B } & 5 \\\hline \text { D } & \text { B } & 4 \\\hline \text { E } & \text { C } & 7 \\\hline \text { F } & \text { C, D } & 3 \\\hline \text { G } & \text { D } & 6 \\\hline \text { H } & \text { E, F, G } & 5 \\\hline\end{array}$$
CP = Critical Path