A straight wire carries a current of 1.0 A vertically upward (north). A proton moves at a speed of 2.0 x 10 m/s, perpendicular to the wire and travelling away from the wire (toward the east). At some instant, the proton is at a distance of 0.10 m from the wire. a. Find the magnetic field from the wire at the proton's position. As seen by the proton, in what direction does the field point? [2 marks] b. Calculate the force on the proton. Does it point north or south? [2 marks]