Given is a PERT project network diagram as shown below.

$\backslash$table$[[$Activity$,$Start,A$,$B$,$C$,$D$,$E$,$F$,$G$,$H$],[$Time$,0,1\mathrm{.}58,2\mathrm{.}68,2\mathrm{.}56,1\mathrm{.}89,3\mathrm{.}21,3\mathrm{.}83,2\mathrm{.}30,3\mathrm{.}00]]$

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 Acitivity $C=$ Blank $3($in $2$ decimal places$)$ d$)$ The critical activities are $=$ Blank $4($ex$.$ type in critical activities as ABCD, no comma, no space$)$