Both Mamie and Gail play better than Ralph.
Step-by-step explanation:
3) The symbol > will be used to represent scores higher than the other
Gail > Ralph
Sam > Gail, Ralph and Mamie
Mamie > Ralph
From the question, we are not told relationship between Mammie and Gail.
That is the information about their scores is not given.
Gail scores better than Ralph
Mamie also scores better than Ralph.
We don't have enough information to determine who is the better player. Both Mamie and Gail play better than Ralph.