Gravity Form Change Form Field Data Pre Submission hook

// Populate User Level Risk Data (form ID 4)
// add_action( 'gform_pre_submission_4', 'hrx_bigshot_pre_submission2' );
function hrx_bigshot_pre_submission2( $form ) {
    $UserLevel = rgpost( 'input_1' );

    if($UserLevel == 'LowRisk'){
        $_POST['input_5'] = rgpost( 'input_2' );
    } elseif ($UserLevel == 'MidRisk') {
        $_POST['input_5'] = rgpost( 'input_3' );
    } elseif ($UserLevel == 'HighRisk') {
        $_POST['input_5'] = rgpost( 'input_4' );
    }
}

// add_action( 'gform_pre_submission_3', 'hrx_bigshot_pre_submission' );
function hrx_bigshot_pre_submission( $form ) {
    $_POST['input_39'] = print_r($form, true);
}