A girl went to school for the first time and the teacher ask her how old are you?, the girl said i dont know but i know my mother age is twice my age.the teacher ask then how old is your mother? the girl said i dont know but i know my father is five years older than my mother. the teacher ask then how old is your father? the girl said i dont know but i know the sum of our age will give you a hundred a)how old is the girl b)how old is the mother c)how old is the father?​