Relevant information for a project consisting of activities $A,B,$dots,$H$ is provided in the table below and the project network is provided.

$\backslash$table$[[$Activity$,$Time $($in Weeks$),$Cost,$\backslash$table$[[$Immediate$],[$Predessors$]]],[$Normal$,$Crash,Normal,Crash,$],[$A$,5,5,$$$1450,$$$1450,$NA$],[$B$,2,1,$$$550,$$$750,$A$],[$C$,5,3,$$$1850,$$$2030,$A$],[$D$,6,5,$$$800,$$$840,$B$,$ C$],[$E$,5,4,$$$650,$$$690,$B$,$ C$],[$F$,3,2,$$$900,$$$915,$D$],[$G$,4,2,$$$1550,$$$1584,$E$],[$H$,3,1,$$$1900,$$$2260,$F$,$ G$]]$

When all activities are completed in normal time, what is the project completion time?

To reduce project completion time by $1$ week at minimum cost, which activity, or activities should be crashed? Enter the letter for the activity $($one character in capital$),$ or letters for the activities in capitals $($two characters in capitals$)($e$.$g$.\text{'}$B$\text{'},\text{'}$AH$\text{'}).$

What is the incremental cost to reduce project completion time by $1$ week at minimum cost?

Please help ASAP?