The expected value and variance of the time needed by activity $H$ are, respectively

$4,0\mathrm{.}4444$

$5,0\mathrm{.}4444$

$5,1\mathrm{.}7778$

$10,0\mathrm{.}4444$

none of the above

Question $5$

The activities on the critical path are

A$,$ B$,$ D$,$ E$,$ F$,$ J$.$

A$,$ B$,$ D$,$ E$,$ F$.$

$B,C,D,E,F,J.$