The midterm papers should be 5-10 pages; the final paper should be 10-15. Papers are expected to conform to the usual academic standards. Apart from the obvious -- no cheating; your work should be entirely your own -- I expect proper bibliography. Make sure you indicate, via proper appropriate bibliographic pointers, what material you've taken from other works.
The final paper is due by 7:00 pm, on the day of the final exam schedule posted by the registrar. NO EXCEPTIONS.