per day. The company will incur a $$100$ per day penalty for each day the project lasts beyond day $18.$

$\backslash$table$[[$Activity$,\backslash$table$[[$Normal$],[$Time $($days$)]],$Normal Cost $($$$),\backslash$table$[[$Crash$],[$Time $($days$)]],\backslash$table$[[$Crash Cost$],[($$$)]],$Immediate Predecessor$($s$)],[$A$,6,800,3,2,000,-],[$B$,5,1,000,3,1,200,-],[$C$,5,500,3,1,500,$A$,$ B$],[$D$,3,1,200,2,1,500,$B$],[$E$,5,1,500,2,2,100,$C$,$ D$],[$F$,3,1,300,1,1,400,$E$],[$G$,4,900,3,1,000,$G$],[$H$,5,500,5,500,]]$

a$.$ What is the project's duration if only normal times are used?

The project duration is day$($s$).($Enter your response as an integer.$)$

b$.$ What is the minimum$-$cost schedule?

With the minimum$-$cost schedule, the project duration is day$($s$).($Enter your response as an integer.$)$

c$.$ What is the critical path for the minimum$-$cost schedule?

The critical path for the minimum$-$cost schedule is