$\backslash$table$[[,$Time $($weeks$),$Immediate,,Time $($weeks$),$Immediate$],[$Activity$,a,m,b,$Predecessor$($s$),$Activity,$a,m,b,$Predecessor$($s$)],[$A$,4,8,10,-,$G$,2,3,4,$C$,$ E$],[$B$,1,9,23,$A$,$H$,2,2,2,$F$],[$C$,9^{\text{'}},12,18,$A$,1,5,5,5,$F$],[$D$,4,6,9,$A$,$J$,4,7,14,$D$,$ G$,$ H$],[$E$,1,3,4,$B$,$K$,3,3,4,$I, J$],[$F$,5,9,21,$C$,$ E$,,,,,]]$

The expected $($estimated$)$ time for activity $C$ is $12\mathrm{.}5$ weeks. $($Round your response to two decimal places.$)$

The variance for activity $C$ is weeks. $($Round your response to two decimal places.$)$