For a CPM Model, You Are Given the Following Data

For a CPM model, you are given the following data with time in weeks. $\begin{array}{cccccc}\text { Activity } & \begin{array}{c}\text { Immediate } \\\text { Predecessors }\end{array} & \begin{array}{c}\text { Normal } \\\text { Time }\end{array} & \text { Normal Cost } & \begin{array}{c}\text { Crash } \\\text { Time }\end{array} & \text { Crash Cost } \\\text { A } & -- & 9 & 3200 & 5 & 6000 \\\text { B } & -- & 7 & 1400 & 5 & 2400 \\\text { C } & \text { A } & 6 & 1500 & 5 & 2000 \\\text { D } & \text { B } & 5 & 2500 & 3 & 4000 \\\text { E } & \text { A, B } & 4 & 1800 & 3 & 2800 \\\text { F } & \text { D, E } & 3 & 1800 & 1 & 4800\end{array}$
A.If activity A needed to be completed in 6 weeks, what would its cost be?
B.If $3000 were allocated to activity D, how long would it take to complete?