Conditional Confirmation

Hello, I have created a quiz with scores calculation and several confirmation messages using the instruction from http://www.gravityhelp.com/forums/topic/mathematics-to-gravity-forms.

My first quiz question is a Yes or No (with values 1 and 0). I have six total confirmation messages to include, 3 for scores IF the first question is YES and 3 IF the first question is NO. My code is shown below, which currently includes the 3 confirmations for YES, I would like to add a condition here, and then use the same condition for NO and add the 3 confirmations for NO.

Any help would be greatly appreciated.

add_action('gform_pre_submission', 'ch_total_quiz_values');
function ch_total_quiz_values ($form) {
        // change the number 2 here to your form ID
        // if this is not form 2, don't do any processing
        if($form['id'] != 2)
                return $form;

        // otherwise ...
        $score = 0;
        // my radio button inputs are numbered 1 to 20.  Change the beginning
        // and ending number in this loop to match your actual input numbers
        for($i=1; $i<=14; $i++) {
                // add the value of the $_POST value for input 1 to input 20
                $input  = 'input_' . $i;
                $score += rgpost($input);
        }
        // update the hidden 'Score' field with our calculated score
        $_POST['input_25'] = $score;
        switch($score) {
                // my "admin only" Rating field to hold the display message based on the score in input_24
                case 7:
                case 8:
                case 9:
                case 10:
                case 11:
                case 12:
                case 13:
                case 14:
                case 15:
                case 16:
                case 17:
                case 18:
                        $_POST['input_24'] = 'Response Here';
                        break;
                case 19:
                case 20:
                case 21:
                case 22:
                case 23:
                case 24:
                case 25:
                case 26:
                case 27:
                case 28:
                case 29:
                        $_POST['input_24'] = 'Response Here.';
                        break;
                case 30:
                case 31:
                case 32:
                case 33:
                case 34:
                case 35:
                case 36:
                case 37:
                case 38:
                case 39:
                case 40:
                case 41:
                case 42:
                        $_POST['input_24'] = 'Response Here';
                        break;
        }
        return $form;
}

Bump to the top - any help?

I'm trying to call the field ID and associated value with a IF statement, and not quite getting it.

How can I call a specific field ID and Value?
Replacing the ID and VALUE is not working for me: $field['ID']='VALUE'

Where would I place the corrected code in the example below to have two separate confirmation messages? One if value = 1 and another if value = 2.

$_POST['input_25'] = $score;
        switch($score) {
                // my "admin only" Rating field to hold the display message based on the score in input_24
                case 0:
                case 1:
                case 2:
                case 3:
                case 4:
                case 5:
                        $_POST['input_24'] = '5 or fewer correct answers: You\'re a complacent leader who ignores changes in the environment.';