How to check for multiple radio button selections?

I have a question form that I want to validate using jquery. My form looks like this:

<form id="question_answer_form" action="submit_answers.php" method="post">       

            <table class="zebra-striped">

                <tr>

                    <td >Question 1</td>



                    <td>

                        <input type="radio" name="question_answer1" value="1"> Yes

                        <input type="radio" name="question_answer1" value="0"> No

                    </td>

                </tr>

                <tr>

                    <td >Question 2</td>

                    <td>

                        <input type="radio" name="question_answer2" value="1"> Yes

                        <input type="radio" name="question_answer2" value="0"> No

                    </td>

                </tr>

                <tr>

                  <td >Question 3</td>

                    <td>

                        <input type="radio" name="question_answer3" value="1"> Yes

                        <input type="radio" name="question_answer3" value="0"> No

                    </td>

                </tr>

                <tr>

                   <td colspan="2"><input class="btn success" type="button" value="Submit" id="questions"/></td>

                </tr>

            </table>

       </form>

Jquery call

$("#questions").click(function (e) {

        e.preventDefault();



        // Check radio button status and notify...;

    });

Any suggestions?