A point charge for which Q = 2 × 10⁻¹⁶ C and m = 5 × 10⁻²⁶ kg is moving in the combined fields E = 100a_x − 200a_y + 300a_z V/m and B =−3a_x + 2a_y − a_z mT. If the charge velocity at t = 0 is v(0) = (2a_x − 3a_y − 4a_z)10⁵ m/s

(a) Give the unit vector showing the direction in which the charge is accelerating at t = 0;

(b) Find the kinetic energy of the charge at t = 0.