A sample of students were questioned to determine how much they would be willing to pay to see a movie in a theater that served dinner at the seats. The male students responded (in dollars): 10, 15, 15, 25, and 12. The female students responded: 8, 30, 15, and 15. Write these data as they might appear in

(a) Stacked format with codes

(b) Unstacked format.