Problem $17-10($Static$)$

The project described in the following table has just begun. It is scheduled to be completed in $11$ weeks. Use Table B$1$ and Table B$2.$

$\backslash$table$[[$Path$,$Activity,$\backslash$table$[[$Estimated Time$],[($weeks$)]],\backslash$table$[[$Standard Deviation$],[($weeks$.)]]],[$A$,$C$,4,0\mathrm{.}70],[,$D$,6,0\mathrm{.}90],[$B$,$E$,3,0\mathrm{.}62],[,$F$,9,1\mathrm{.}90]]$

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a$.$ If you were the manager of this project, would you be concerned? $($Round your intermediate calculations to $2$ deci and "Probability" values to $4$ decimal places.$)$

because the probability of finishing on schedule is about