Chromium metal can be produced from the high-temperature reaction of Cr2O3 [chromium(III) oxide] with silicon or aluminum by each of the following reactions:Cr2O3(s) + 2 Al(ℓ) → 2 Cr(ℓ) + Al2O3(s)2 Cr2O3(s) + 3 Si(ℓ) → 4 Cr(ℓ) + 3 SiO2(s)a. Calculate the number of grams of aluminum required to prepare 400.0 g of chromium metal by the first reaction.b. Calculate the number of grams of silicon required to prepare 400.0 g of chromium metal by the second reaction.