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An assembly line has 5 workers who all work in a row.
Erin works to the right of Ethan
Frank works between Felicia and Gabriel.
Felicia works to the left of Ethan.
Gabriel works to the right of Ethan.

Which statement must be true?

-Ethan works between Erin and Felicia.
-Gabriel works between Erin and Ethan.
-Felicia works in the four soot from the left
-Erin works to the left of Gabriel.
-Ethan works to the left of Frank.