(2) (a) B × Q ÷ L × R B × Q ⇒B is the brother of Q. Q ÷ L ⇒L is the father of Q. L × R ⇒L is the brother of R. L is father of B. The sex of R is not known. (b) B × D ÷ J × R × K B × D ⇒B is the brother of D. D ÷ J ⇒J is the father of D. J × R ⇒J is the brother of R. R × K ⇒R is the brother of K. It is clear that R is the paternal uncle of B. (c) R × P ÷ S × B R × P ⇒R is the brother of P. P ÷ S ⇒S is the father of P. S × B ⇒S is the brother of B. R is the nephew of B.