An alpha particle (q = 3.2 x 10 ^-19 C and m = 6.6 x 10 ^-27 kg) travels at a speed of 8.0 x 10 ⁶ m / s in the +x direction. A uniform magnetic field with a magnitude of 1.2 T is pointed in the +y direction. Find the magnitude and the direction of the acceleration of the alpha particle at the moment when it is injected into the field.