topic is project management

\begin{tabular}{|c|c|c|c|c|c|} \hline Task & Predecessor & Normal time (days) & Normal cost (\$) & Crash time (days) & Crash cost (\$) \\ \hline A & & 6 & 300 & 6 & \\ \hline B & A & 8 & 400 & 6 & 600 \\ \hline C & A & 6 & 500 & 4 & 620 \\ \hline D & B, C & 8 & 400 & 6 & 480 \\ \hline E & C & 4 & 500 & 4 & \\ \hline F & B & 6 & 400 & 2 & 520 \\ \hline G & F & 4 & 500 & 2 & 540 \\ \hline H & D, E & 8 & 600 & 4 & 840 \\ \hline I & G, H & 4 & 400 & 2 & 800 \\ \hline \end{tabular} 4. Crash the project to its minimum duration (the fastest it can be completed) a. For the following paths indicate to what duration can each be crashed, and if they need to be fully crashed: - Path A to G - Path A to H b. Total duration of the project crashed to its minimum. c. Total cost to crash the project to its minimum duration