Write functions for each of the following transformations using function notation. Choose a different letter to represent each function. For example, you can use R to represent rotations. Assume that a positive rotation occurs in the counterclockwise direction. translation of a units to the right and b units up reflection across the y-axis reflection across the x-axis rotation of 90 degrees counterclockwise about the origin, point O rotation of 180 degrees counterclockwise about the origin, point O rotation of 270 degrees counterclockwise about the origin, point O