Study the following information carefully and answer the given questions:

If ‘P @ Q’ means ‘P is the mother of Q’

If ‘P $ Q’ means ‘P is the father of Q’

If ‘P & Q’ means ‘P is the sister of Q’

If ‘P % Q’ means ‘P is the brother of Q’

If ‘F $ O % R & T $ U & N % U’ is given, then how many male members are there in the family?