Figure (a) below gives the magnitude E(x) ofthe electric fields that have been set up by a battery along aresistive rod of length L = 9.02 mm (Fig. belowb). The vertical scale is set by Es =4.02 ×103 V/m. The rod consists of three sections of the same material but with different radii. (The schematic diagram of the figure (b) below does not indicate the different radii.) The radius of section 3 is 2.22 mm. What is theradius of (a) section 1and (b) section 2?