8 views

$\begin{array}{rlr}a^*=\max _{x, y} & x^2+y^2-8 x+7 \\ \text { s.t. } & x^2+y^2 \leq 1 \\ & y \geq 0\end{array}$
Then $a^{\star}$ is

1. $16$
2. $14$
3. $12$
4. $10$
5. None of the above