Using the following project information

The critical path is A$-$C$-$E$-$G$-$I$-$J$.$

$($a$)$ Calculate the probability that the project will be completed in $31$ weeks. $($Round your answer to $4$ decimal places, e$.$g$.1\mathrm{.}7945.)$

P$($project $31-$

$($b$)$ Calculate the probability that the project will be completed in $34$ weeks. $($Round your answer to $4$ decimal places, e$.$g$.1\mathrm{.}7945.)$

P$($project $34$