If the polar coordinates of the point (x, y) are (r, θ), determine the polar coordinates for the following points. (Use the following as necessary: r and θ. Assume θ is in degrees. ) (a) (−x, y) (−x, y) = (, ) (b) (−2 x, −2 y) (−2 x, −2 y) = (, ) (c) (3 x, −3 y) (3 x, −3 y) = (, )