Complete the RectangleManager class below so that it implements the given Adjuster interface. The implementation should use the h and w parameters as the incremental amounts by which the o object's current height and width are to be changed, respectively.

For example, if the original rectangle has width of 10 and height of 20, and the increments are 5 and 7 for width and height respectively, the new dimensions of the rectangle should be width of 15 and height of 27.