Given is a Decision Tree Diagram. The Payoffs 1-14 are given in the table below. Answer questions a, b, and c.

a) The value at node 4 =

b) The value at node 8 is = (in 1 decimal place)

c) The best course of action or decision is to select____

PLEASE ANSWER CAREFULLY

\begin{tabular}{|l|l|l|l|l|l|l|l|l|l|l|l|l|l|l|l|l|l|l|l|l|l|l|l|l|l|} \hline Pay off & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 & 11 & 12 & 13 & 14 \\ \hline$ & 6 & 6 & 5 & 4 & 6 & 7 & 3 & 7 & 8 & 5 & 8 & 4 & 4 \\ \hline \end{tabular}