Question $3(10$ points$)$:

Calculate the min cost curve for the following Network

Normal Cost $=$$$200,000$

$\backslash$table$[[\backslash$table$[[$Acti$],[$vity$]],\backslash$table$[[$Normal$],[$duration$]],\backslash$table$[[$Crash$],[$Duration$]],\backslash$table$[[$Days to$],[$crash$]],\backslash$table$[[$Crash cost$],[$perday$]]],[$A$,5,5,0,-],[$B$,4,4,0,-],[$C$,6,6,0,-],[$D$,7,4,3,$$$2,000$