$\backslash$table$[[,$Time $($weeks$),$Immediate,,Time $($weeks$),$Immediate$],[$Activity$,a,m,b,$Predecessor$($s$),$Activity,$a,m,b,$Predecessor$($s$)],[$A$,6,9,12,-,$G$,2,3,5,$C$,$ E$],[$B$,1,8,24,$A$,$H$,1,1,1,$F F$],[$C$,9,12,18,$A$,$I,$5,5,5,$F$],[$D$,4,7,10,$A$,$J$,6,8,12,$D$,$ G$,$ H$],[$E$,1,3,4,$B$,$K$,1,1,4,$I, J$],[$F$,6,8,21,$C$,$ E$,,,,,]]$

a$)$ The expected $($estimated$)$ time for activity $C$ is $12$ weeks. $($Round your response to two decimal places.$)$

b$)$ The variance for activity $C$ is $1\mathrm{.}78$ weeks. $($Round your response to two decimal places.$)$

c$)$ Based on the calculation of the estimated times, the critical path is A$-$C $-$ F $-$ H$-$J $-$ K