136} (9 a' Four straight wires are positioned at the corners of a square, d: 3.00 cm apart as shown above. The wires all carry a current of 2.1 D A in the directions shown. If an electron happens to be at the point P in the centre of the square, moving in the direction shown with a speed of V: 2.30 x107 m/s, what is the manitude of the force on the electron at that instant