In a group of friends: X, Y, Z, and W, each has a different favorite color: Red, Blue, Green, and Yellow. X does not like Red or Blue. Y likes Green. Z does not like Yellow. What color does W like?
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?