The accompanying figure shows a cross-section of a long, hollow, cylindrical conductor of inner radius T = 3 cm and outer radius 7 = 6.5 cm. A 38-A current distributed uniformly over the cross-section flows into the page. Calculate the magnetic field at r = 0.5 cm, r =4 cm, and r = 7.5 cm. Hints 1 12 a. Magnetic field at r = 0.5 cm is 8.994E-6 b. Magnetic field at r = 4 cm is 0 c. Magnetic field at r = 7.5 cm is 1.0133E-4 T. Additional hint for (a) XT. Additional hint for (b) T. Additional hint for (c) Use the "E" notation to enter your answer in scientific notation. For example, to enter 3.14 x 10-2, enter "3.14E-12".