The three circular concentric loops of wire, each containing 10 turns are given. The inner loop consists of a radius of 10cm, the middle loop consists of a radius of 20cm, and the outer loop consists of a radius of 35cm. The current in the inner loop is I1=2.0A, the middle loop I2 = 4A. Both I1 and I2 are in the counter-clockwise direction. Find out the current in the outer loop (magnitude and direction) when the magnetic field at the center is 1.8 x 10^-4 T directed to the page?