Pavel buys five new college textbooks during his first year at school at a cost of $80 each. Used books cost only $50 each. When the bookstore announces that there will be a 10% increase in the price of new books and a 5% increase in the price of used books, Pavel's father offers him $40 extra. a. What happens to Pavel's budget line? Illustrate the change with a graph where new books is on the vertical axis and used books are on the horizontal. b. Is Pavel worse or better off after the price change? Explain