The following activities are part of a project to be scheduled using CPM:

$\backslash$table$[[$ACTIVITY$,$IMMEDIATE PREDECESSOR,TIME $($WEEKS$)],[$A$,-,5],[$B$,$A$,8],[$C$,$A$,4],[$D$,$C$,6],[$E$,$Bi D$,2],[$F$,$D$,3],[$G$,$E$,$ F$,6]]$

a$.$ What is the critical path?

b$.$ How many weeks will it take to complete the project?

c$.$ How much slack does activity B have?