Use This Graph to Answer the Questions AWhich Area (I, II, III, IV, or V) Forms the l

Essay

Use this graph to answer the questions. $$\begin{array} { l l } \operatorname { Max } \quad & 20 x + 10 y \\\text { s.t. } & 12 x + 15 y \leq 180 \\&15 x + 10 y \leq 150 \\&3 x - 8 y \leq 0 \\&x , y \geq 0\end{array}$$
a.Which area (I, II, III, IV, or V) forms the feasible region?
b.Which point (A, B, C, D, or E) is optimal?
c.Which constraints are binding?
d.Which slack variables are zero?