Work out a solution to the problem on your own. After you get your work checked, get together with other students to see how their answers compare. If you are not sure what the answer should be, ask in class, post to the discussion page, see the TA during his/her office hours, or see the professor during his office hours. You are still expected to turn in your own copy of the homework.
An explanation is expected for each answer. If you only provide diagrams, you should not expect to receive points.