Find the indicated value of the function f(x,y) = 2x + 7y -5. f(2, - 2) . . . Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. f(2, -2) = 15 . (Simplify your answer.) O B. f(2, -2) is undefined.Find the partial derivative of the dependent variable with respect to each of the independent variables. Z = 4x' - 6y8 dz = 28x6 ax ozFind the partial derivative of the function with respect to each of the independent variables. f (x,y) = x3 + 3x2y+ 4xy3 of of O A. =x +3xy +4y3. ax =3x2+ 4xy2 of of O B. ax = 3x + 2xy + 4y ; dy = 3x2+ 3xy2 of of O C. ax = 3x +6xy + 4y" dy =3x2+ 12xy of of OD. Ox = 3x 2. dy =3x2 + 12xy?Find the partial derivative of the dependent variable with respect to each of the independent variables. z= (5x2 + xy3) 5 oz ax = 5(5x + xy3)4(10x + y3) dz