Given the following information, use the critical path method to determine:

$\backslash$table$[[$Tasks$,\backslash$table$[[$Immediate$],[$predecessors$]],\backslash$table$[[$Time$],[($hours$)]]],[$A$,-,5],[$B$,$A$,5],[$C$,$A$,10],[$D$,$B$,$C$,30],[$E$,$B$,$C$,15],[$F$,$E$,25],[$G$,$D$,$F$,10]]$

a$.$ How long the total process will take. $($please show the steps.$)$

b$.$ What is the critical path?

c$.$ Which activities have slack, and how much? $($please show the steps.$)$