If M - N means M is the sister of N, and N + O means N is the brother of O, what is the relationship between M and O?

B. COUSIN

If P × Q means P is the mother of Q, and Q + R means Q is the brother of R, what is the relationship between P and R?

B. MOTHER

If J ÷ K means J is the daughter of K, and K - L means K is the sister of L, what is the relationship between J and L?

B. AUNT