Refer to the Table Below to Answer the Question(s) That

Refer to the table below to answer the question(s) that follow:
$~~~~~~~~~~~~~~~~~~~~~~~~~Activity~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Times~ (weeks)\\\begin{array}{c}\text { Activity } & \text { Predecessor } & \text { Optimistic } & \text { Most Likely } & \text { Pessimi } \\\hline \text { A } & --- & 9 & 15 & 21 \\\text { B } & --- & 13 & 21 & 23 \\\text { C } & \text { A } & 6 & 9 & 18 \\\text { D } & \text { A } & 23 & 35 & 47 \\\text { E } & \text { B } & 19 & 26 & 27 \\\text { F } & \text { C } & 23 & 29 & 41 \\\text { G } & \text { D,E } & 14 & 20 & 26 \\\text { H } & \text { F,G } & 2 & 5 & 8\end{array}$
-What are the estimated expected completion (mean) times (in weeks) for activities A-H?