roblem 7. point) For the function f(z, y) = -21" - zy - 2y" + 5z + 5y - 2, find and classify all critical oints DA. (1, 1) , Relative Maximum B. (0,0), Saddle C. (0, 0), Relative Minimum D. (1,1), Saddle E. J (1, 1), Relative Maximum (0,0), Relative Minimum preview answers