Explain what current flux is needed for depositing a layer of metallic Cr of 0.23 mm of width, on the bar of a car with a total area of 0.32 m2, from a solution that has CrO42-(ac) where the density of metallic Cr is 7.2g/cm3 and the time of the electrolysis is 6 seconds (CrO42-(ac) --> Cr(s) acid medium).