There are five members P, Q, R, S and T in a family. R is the only child of Q. Four years ago, Q was 50 years old. The present age of the eldest member of the family is 64 years. R is younger than her husband S, and the present age difference between Q and R is 28 years. The ratio of the age of that female member who is not the youngest to the age of the youngest male member of the family is 8 : 5, respectively. S is the son-in-law of T, whose mother-in-law is P. The difference between the average present age of the female members and the average present age of the male members is 4 years (female average minus male average). Q is not anyone’s mother, and S is not older than any of his in-laws. Which of the following statement(s) is/are true?
I. The present age of the eldest member equals 165% of the present age of T.
II. Eight years hence from now, the ratio of ages of S and T will be 11 : 16 respectively.
III. The difference between the present ages of the youngest female and the eldest male is 28 years.