A coaxial cable is constructed from a central cylindrical conductor of radius r = 1.70 cm carrying current IA = 7.00 A in the positive x direction and a concentric conducting cylindrical shell with inner radius TB 14.0 cm and outer radius rc 15.0 cm with a current of 41.0 A in the negative x direction (see figure below). What are the magnitude and direction of the magnetic field at the following points? A Z IB rc 8 8 "B P (a) at point O, a distance of 10.0 cm from the center of the coaxial cable along the y axis magnitude direction ---Select--- (b) at point P, a distance of 20.0 cm from the center of the coaxial cable along the y axis magnitude direction ---Select---