f(x, y) = sin(x) + sin(y) 10 2 20 2 O 40 80- 8 2 20 2 40 10 O O 6 Find lim (x, y) - (0, 0) A(x, y) (if it exists). (If an answer does not exist, enter DNE.) Need Help? Read It [-/1 Points] DETAILS LARCALC12 13.3.007. Explain whether or not the Quotient Rule should be used to find the partial derivative. Do not differentiate. dy x2 + 100 O Yes, the function is a quotient. O No, y only occurs in the numerator. Need Help? Read It Watch It [-/2 Points] DETAILS LARCALC12 13.3.016. Find both first partial derivatives. z = By3 x dz ax ay Need Help? Read It [-/2 Points] DETAILS LARCALC12 13.3.021. Find both first partial derivatives. z = In(=) az ax dz