A long straight wire carries a current of 50 A. An electron, traveling at 1.0×107m/s, is 5.0 cm from the wire

A long straight wire carries a current of 50 A. An electron, traveling at 1.0×107m/s, is 5.0 cm from the wire. What is the magnitude of the magnetic force on the electron if the electron velocity is directed

a) toward the wire,
b) parallel to the wire in the direction of the current, and
c) perpendicular to the two directions defined by (a) and (b)?