A red wheel speeds up with tangential acceleration aaa at a distance rrr from its center. A blue wheel has a tangential acceleration of 2a2a2, a at a distance 4r4r4, r from its center. How does the angular acceleration of the red wheel \alpha_\text {red}α red alpha, start subscript, start text, r, e, d, end text, end subscript compare with the blue wheel \alpha_\text {blue}α blue alpha, start subscript, start text, b, l, u, e, end text, end subscript?