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; 5x +y =14 Find the Lagrange function F(x,y,a). F ( x, y,2 ) : Find the partial derivatives Fy, Fy, and Fx FX Fu = F1 = There is a value of located at (x,y) = (Type an integer or a fraction. Type an ordered pair, using integers or fractions.)