Given is a PERT project network diagram as shown below.

$\backslash$table$[[$Activity$,$Start,A$,$B$,$C$,$D$,$E$,F,$G$,H,$End$],[$Time$,0,2\mathrm{.}61,5\mathrm{.}00,6\mathrm{.}31,5\mathrm{.}31,2\mathrm{.}65,4\mathrm{.}23,4\mathrm{.}12,7\mathrm{.}13,0]]$

a$)$ The Project Completion time $=$ Blank $1($in $2$ decimal places$)$ b$)$ The Earliest Start time, ES$,$ of Activity G$=$Blank $2($in $2$ decimal places$)$ c$)$ The Latest Finish time, LF$,$ of A citivity C$=$ Blank $3($in $2$ decmal places$)$ d$)$ The critical activities are $=$ Blank $4($ex$.$ type in critical activities as$,$ ABCD, no comma, no space$)$

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