Given is a CPM project network diagram as shown below.

a$)$ The Project Completion time $\backslash (=\backslash )$

days.$)$

b$)$ The Earliest Start time, ES$,$ of Activity G $=$ days.

c$)$ The Latest Finish time, LF$,$ of Acitivity $\backslash (\backslash$mathrm$\{$C$\}=\backslash )$ days.

d$)$ The critical activities are $\backslash (=\backslash )($ex$.$ Fill in answer as: ABCD $)$