Payoff

$1$

$2$

$3$

$4$

$5$

$6$

$7$

$8$

$9$

$10$

$11$

$12$

$13$

$14$

$

$3$

$5$

$5$

$4$

$-2$

$5$

$1$

$4$

$7$

$5$

$5$

$4$

$3$

$2$

a$)$ The value at node $4$ is $?$

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

c$)$ The best course of action or decision is to select alternative $?$