Solve this

Find the critical points of the function f(x, y) = 24 +y - 144xy Answer : Starting with the point with the smallest a value, use the Second Derivative Test to determine whether each critical point is P1 O A. a saddle point O B. a local maximum O C. test fails O D. a local minimum P2 O A. a local minimum O B. a saddle point O C. test fails O D. a local maximum P3 O A. test fails O B. a local minimum O C. a saddle point O D. a local maximum