premise: Meena has six colored pencils—green, maroon, orange, red, white, and yellow. She sketches a drawing using exactly five of the six pencils, one pencil at a time. The following conditions must hold: No pencil is used more than once. Either the maroon or the yellow pencil is not used. The red pencil is used at some time before the green. The red pencil is used at some time before either the orange or the yellow, but not before both. The green pencil is used at some time before either the maroon or the white, but not before both. Which one of the following could be true?
hypothesis: The yellow pencil is used fourth, whereas the maroon is used fifth.