Locate and classify all extrema in the graph. (By classifying the extrema, we mean listing whether each extremum is a relative or absolute maximum or minimum.) Also, locate any stationary points or singular points that are not relative extrema. (Order your answers from smallest to largest x.) y 18- 12 6 -18 -12 -6 -6 -12 fhas --Select--- ---Select--- a relative minimum f has a relative maximum an absolute minimum an absolute maximum no extremum ✓at (x, y) = at (x, y) = 6 x 12 18 (i) f has --Select--- ✓ at (x, y) = f has ---Select--- at (x, y) = f has --Select--- at (x, y) = f has --Select--- at (x, y) =