If A + B means A is the brother of B, A - B means A is the sister of B, and A × B means A is the father of B, what is the relationship of C if A + C - B means A is the brother of C and C is the sister of B?
If A * B means A is the father of B, A + C means A is the brother of C, and C - D means C is the sister of D, what is the relationship of D to B if A * B + C - D means A is the father of B, A is the brother of C, and C is the sister of D?