If P ÷ Q means P is the father of Q, and Q - R means Q is the sister of R, what is the relationship of P to R?

A. FATHER

If M + N means M is the sister of N, and N * O means N is the father of O, what is the relationship of M to O?

A. AUNT

If J - K means J is the daughter of K, and K + L means K is the brother of L, what is the relationship of J to L?

C. NIECE