Given is a Decision Tree Diagram. The Payoffs $1-14$ are given in the table below. Answer questions a$,$ b$,$ and c$.$ Screen Shot $2021-07-27$ at $2\mathrm{.}02\mathrm{.}39$ PM$(15).$png Payoff $1234567891011121314$ $ $68-4284-37-465-373$ a$)$ The value at node $4$ is Blank $1$ b$)$ The value at node $8$ is Blank $2($in $1$ decimal place$)$ c$)$ The best course of action or decision is to select alternative Blank $3$