Sounds like a homework assignment.
1. Google for keywords like "linux, shell, programming, howto". I presume you also have a textbook and/or course notes.
2. Figure out how to find out the #/arguments into your script (hint: it's the special variable "$#").
3. Figure out how to print each of the arguments. In a loop. (hint: it'll probably involve the "shift", "while" and "expr" commands).
4. Print the arguments in reverse order.