Present age of father is 42years and of his sob is 14years find the r

This question was asked in Ex 12.2, 1

Present age of father is 42years and of his sob is 14years find the ratio of
AGE OF FATHER TO THEIR SON WAS 12YEARS OLD
AGE OF FATHER AFTER 10 YEARS TO THE AGE OF HIS SON AFTER 10 YEARS
AGE OF FATHER TO THE AGR OF HIS SON WHEN FATHER WAS 30 YEARS OLD