Find the extremum of f(x,y) subject to the given constraint, and state whether it is a maximum or a minimum. f(x,y) = xy; 4x + y= 10 Find the Lagrange function F(x,y,2). F(x,y,2) = -2 Find the partial derivatives Fx, Fy, and Fx F. F E There is a value of located at (x,y) = (Type an integer or a fraction. Type an ordered pair, using integers or fractions.)