Consider the following data:

Time Estimates $($days$)$

Activity Precedes Optimistic Most Likely Pessimistic

$\backslash$table$[[$Start$,$A$,$B$,$C$,,-,-],[$A$,$D$,38,50,62],[$B$,$E$,90,99,108],[$C$,$End,$185,100,115],[$D$,$F$,19,25,37],[$E$,$End,$91,100,115],[$F$,$End,$62,65,68]]$

For activity D$,$ what are the estimated expected $($mean$)$ time $($te$)$ and variance?

$25$ days and $18$ days

$116\mathrm{.}67$ days and $24$ days

$81$ days and $3$ days

$26$ days and $9$ days

$133\mathrm{.}33$ days and $2$ days respectively