A shown below, an electron of charge -e is moving at a constant velocity with a speed v at 30 below a long horizontal wire carrying a current I. At some instant the electron is at a distance r from the wire. A11 answers should be expressed in terms of the given variables and constants. (a) Write down the magnetic eld due to the wire acting on the electron. Give its magnitude and direction. - (b) Calculate the magnetic force acting on the electron. Give its magnitude and direction (Draw the direction on the above Figure)