A sample (5.6 g) containing iron is completely dissolved in cold dilute HCl to prepare a 250 mL of solution. Titration of 25.0 mL of this solution requires 12.5 mL of 0.03 M KMnO4 solution to reach the end point. Number of moles of Fe+ present in 250 mL solution is x 102 (consider complete dissolution of FeCl). The amount of iron present in the sample is y% by weight. (Assume: KMnO4 reacts only with Fe+ in the solution Use: Molar mass of iron as 56 g mol) The value of x is