Find the Value(s) of the Function, Subject to the System $P=9 x-12 y$

Multiple Choice

Find the value(s) of the function, subject to the system of inequalities.
-Find the maximum and minimum of $P=9 x-12 y$ subject to:
$0 \leq x \leq 5,0 \leq y \leq 8,4 x+5 y \leq 30$ , and $4 x+3 y \leq 20$ .

A) $-72,0$
B) 45,0
C) $45,-72$
D) $-48.75,-72$