What is the current in a wire of radius R = 3.47 mm if the magnitude of the current density is given by (a) la = Jor/R and (b) Jb = 10(1 - r/R) in which r is the radial distance and J0 = 4.39 x 104 A/mz? (c) Which function maximizes the current density near the Wire's surface? (a) Number a Units 4} 1) (b) Number l Units (C) {D