please answer all the way until weeks b,d,e,and f !!! thank you!!!

The following is a fable of activities associated with a project at Ratay ishfog's software fim in Chicago, their durntions, what activites each must precode and the crash cost to reduce duration per week \begin{tabular}{cccc} \hline Activity Duration (weeks) & Precedes & Crash CoseWeek \\ \hline A (star) & 2 & B, C & $380 \\ B & 2 & E & $130 \\ C & 6 & F & $240 \\ E & 2 & F & $140 \\ F(end) & 3 & - & $400 \\ \hline \end{tabular} Suppose than Raday is only given B weeks (hstead of 11) to complese the project By how many woeks should each activiy be crashed in order to meat the deadline? Assume that you can crash an activiy down to 0 weeks duration. \begin{tabular}{cc} \hline EachActivityActivity \\ ShouldbeReducedBY(weeks) \\ \hline A & 0 weedic(s) \\ B & week(s) \end{tabular}