A proton; deuteron (q = e, m = 2.0 u), and an alpha particle (q = 2e, m = 4.0 u) are accelerated through the same potential difference and then enter the same region of uniform magnetic field B, moving perpendicular to B. (a) What is the ratio of the proton's kinetic energy Kp to the alpha particle's kinetic energy Ka? (b) What is the ratio of the deuteron's kinetic energy Ka to Ka? Assume that the radius of the proton's circular path is 11.5 cm. (c) What is the radius of the deuteron's path? (d) What is the radius of the alpha particle's path?