A 50.0 mL sample containing Ca+2 and Mn+2 was treated with 87.7 mL of 0.0400 M EDTA. Titration of the excess unreacted EDTA required 18.7 mL of 0.0300 M Ca2 . The Cd2 was displaced from EDTA by the addition of an excess of CN-. Titration of the newly freed EDTA required 25.5 mL of 0.0250 M Ca2 . What were the molarities of Cd2 and Mn2 in the original solution?