Answer: Vault = Emery, Chris, Alex, Blake
Beam = Chris, Blake, Emery, Alex
Floor = Blake, Emery, Chris, Alex
Explanation:
Make a table and start filling in what you know with the given clues






Chris finished 2nd on Vault, 1st on Beam, and 3rd on Floor
Alex finished 3rd on Vault, 4th on Beam, and 4th on Floor
Emery finished 1st on Vault, 3rd on Beam, 2nd on Floor
Blake finished 4th on Vault, 2nd on Beam, 1st on Floor