If the indirect costs for each duration are $$1,250$ for $16$ weeks, $$1,150$ for $15$ weeks, $$1,000$ for $14$ weeks, $$900$ for $13$ weeks, $$850$ for $12$ weeks, $$800$ for $11$ weeks, and $$750$ for $10$ weeks, compute the total costs for each duration. What is the orfimum cost$-$time schedule? $[10$ Marks$]$

$\backslash$table$[[$Cresh Cost $($Slope$),$Maximue Crash Tipe,Normal Time,Normal Cost,$],[1,10,1,4,30],[3,70,2,7,60],[6,0,0,1,80],[1,20,2,4,40],[6,50,3,5,110],[1,3,5,90,],[6,1,2,60,],[1,1,2,70,],[1,0,2,140,],[,40,,$Time unit $=1$ week,$]]$