A negative point charge q = −7.20 mC is moving in a reference frame. When the point charge...

A negative point charge q = −7.20 mC is moving in a reference frame. When the point charge is at the origin, the magnetic field it produces at the point x = 25.0 cm, y = 0, z = 0 is B = (6.00μT) , and its speed is 800 m/s. (a) What are the x-, y-, and z-components of the velocity  of the charge? (b) At this same instant. what is the magnitude of the magnetic field that the charge produces at the point x = 0, y = 25.0 cm, z = 0?