A project has $3$ activities $($in row$)$ where the duration and the immediate predecessors of each activity are provided in the following table.

$1.$ Determine the expected duration of the project $(1\mathrm{.}5$ points$).$

$2.$ determine the Variance $^$ of the project duration $(1\mathrm{.}5$ points$).$

The rubric

Correct answer Correct formula & wrong answer Wrong formula or no attempt

For any part$/$problem $100\%50\%0$

Note: You get the points if all the calculations are done in the cells of this excel sheet.Tasks Duration immediate predecessors

a $=$ Optimistic time m $=$ Most likely time b $=$ Pessimistic time

$16910-$

$23451$

$34682$