$$ i$.$ What is the predicted ceteris paribus difference in salary for schools with a median GPA different by one point? $($Report your answer as a percentage$)(1)$

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$$ ii$.$ Interpret the coefficient on the variable log$($libvol$)(2)$

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$$ iii.$$ Would say it is better to attend a higher ranked law school? How much is a difference in ranking of $20$ worth in terms of predicted salary? $(2)$