A copper wire of radius a = 0.331 mm has an aluminum jacket of outer radius b = 0.459 mm. There is a currenti = 2.23 A in the composite wire. Take the resistivity for copper and aluminum to be 1.69 x 10-8Ω·m and2.75 x 10-8Ω·m. Calculate the current (in A)in (a) the copper and (b) the aluminum. (c) If a potential difference V= 10.6 V between the ends maintains the current, what is the lengthin meters of the composite wire?