Question $2(4$ points$)$

Given the Activity $on$ Arrow Diagram and the data found $in$ the table above, calculate each $of$ the following values:

Activity $A...........t_e=32$

Standard Deviation $=3$

Activity $B...........t_e=$

Standard Deviation $-$

Activity $C...........{?}_{(}()e)=$

Standard Deviation $-$

Activity $D.........e_e=$

Standard Deviation $-$

Activity $E........t_e=$

Standard Deviation $=7$

Path $1-2-5$

Mean Time $-$

Standard Deviation $-5$

Path $1-3-4-5$

Mean Time $-$

Standard Deviation $=$