6. Solution A contains a mixture of iron (II) and iron (III) sulfates. When 25.0 mL of this solu- tion is acidified and titrated with a potassium permanganate solution containing 3.12 g of KMnO4 per liter, 27.6 mL of the permanganate solution is required. Next, a second sample of Solution A is taken, and all the iron (III) in it is reduced to iron (II); the resulting solution is labelled Solution B. A 25.0 mL sample of Solution B required 42.4 mL of the permanga- nate solution. The reaction involved is 2KMnO, + 10FeSO, + 8H,30, K,90, + 2MnSO4 + 8H,0 + 5Fe2(SO.)3 Calculate the concentrations expressed in grams of salt per liter of solution of the iron (II) and iron (III) sulfates in Solution A