4. (2 Points) Consider the function f(2'., y) = m3 3103; + ya. Find both critical points and then use the Second Derivative Test to classify them as local minima1 local maxima, or saddle points. First critical point at (my) = |:|is a 0 Local Max 0 Local Min 0 Saddle O Fails Second critical point at (m, y) = :l is a 0 Local Max 0 Local Min 0 Saddle O Fails