lasts beyond day $16.$

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

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.$)$