In a race, five participants A, B, C, D, and E finish in the following order: A finishes before B but after C. D finishes before E but after B. What is the correct sequence of finishers?
A store sells pencils for $0.50 each and erasers for $0.75 each. If a student buys a total of 10 items for $6.00, how many pencils did the student buy?