QUESTION FOUR

$[20]$

Using the information from the table below, answer the questions that follows

$\backslash$begin$\{$tabular$\}\{|$l$|$l$|$l$|$l$|$l$|\}$

$\backslash$hline Activity & Predecessor & Optimistic Time & Most Likely Time & Pessimistic time $\backslash \backslash$

$\backslash$hline A & $-$ & $1$ & $4$ & $7\backslash \backslash$

$\backslash$hline B & $-$ & $2$ & $6$ & $10\backslash \backslash$

$\backslash$hline C & B & $3$ & $3$ & $9\backslash \backslash$

$\backslash$hline D & A & $6$ & $13$ & $14\backslash \backslash$

$\backslash$hline E & A$,$C & $4$ & $6$ & $14\backslash \backslash$

$\backslash$hline F & B & $6$ & $8$ & $16\backslash \backslash$

$\backslash$hline G & D$,$E$,$F & $2$ & $5$ & $8\backslash \backslash$

$\backslash$hline

$\backslash$end$\{$tabular$\}$

$4\mathrm{.}1.$ Calculate each activity expected time $($in days$)$

$(7)$