There are two families Alens and smiths. They have two children each. There names are A,B,C,D whose ages are different and ages are less then or equal to 11. The following conditions are given:-i) A's age is three years less then his brother's age .ii) B is eldest among the four.iii) C is half the age of the eldest in Alens family.iv) The difference in sum of the ages of Alens children and smiths children is same as that of five years ago.Find the ages of all the children.