Find all points where the given function has any local extrema. Identify any saddle points. f(x,y) = xy + y - 16x Find the local maxima. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. There are local maxima located at (Simplify your answers. Type ordered pairs. Use a comma to separate answers as needed. B. There are no local maxima. Find the local minima. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. There are local minima located at (Simplify your answers. Type ordered pairs. Use a comma to separate answers as needed. B. There are no local minima. Find the saddle points. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. There are saddle points located at (Simplify your answers. Type ordered pairs. Use a comma to separate answers as needed.) B. There are no saddle points.

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