4. two straight wires are parallel and carry currents of 1.2 a in opposite directions, as shown. find the direction of the magnetic field produced by the current in wire 1 at the location of wire 2 and mark the direction directly on your printed diagram using the direction symbols indicated. label the symbol for the field direction b. then find the direction of the magnetic force on wire 2, mark it with the appropriate one of the direction symbols and label the force direction f. finally, explain how your answer for the magnetic field and magnetic force would have changed if the current in wire 1 had been reversed, but the current in wire 2 remained the same, so that both currents were in the same direction.