Find the Indicated Maxima or Minima $f(x, y)=x^{2}+4 y^{2}+6$ , Subject To

Multiple Choice

Find the indicated maxima or minima.
-Minimum of $f(x, y) =x^{2}+4 y^{2}+6$ , subject to $2 x-8 y=20$

A) 26 when $x=2, y=2$
B) 26 when $x=-2, y=2$
C) 26 when $x=2, y=-2$
D) 26 when $x=-2, y=-2$