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 $=$ Jays.

c$)$ The Latest Finish time, LF$,$ of Activity C $=$ days.

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