Problem #$2$: You have crashing information for a project that needs to be finished one week earlier than it is currently expected to complete NormalCrash Crashed Duration Duration $($weeks$)$ Norma Slack Cost $($S$000$s$)($S$000$s$)$ weeks$)302510020$ Cost Activity$($weeks$)50701204012($a$)$ Which activity should be crashed? $($b$)$ What will be the additional cost to the project?