c$.$ Compute the minimum total direct cost for each project duration based on the cost associated with each activity. Consider durations of $13,14,15,16,17,$ and $18$ weeks.

Note: Leave no cells blank $-$ be certain to enter $"0"$ wherever required.

$\backslash$table$[[$Project Duration:,$18$ Weeks,$17$ Weeks,$16$ Weeks,$15$ Weeks,$14$ Weeks,$13$ Weeks$],[$Length of path ABEG,,,,,,$],[$Length of path ACG,,,,,,$],[$Length of path ADFG,,,,,,$],[$Activity crashed,,,,,,$],[$Crash cost for this step,,,,,,$],[$Cumulative crash cost,,,,,,$],[$Total direct cost,,,,,,$]]$