Buttons that automatically add 5, 10 or 15 tickets to cart

/* Buttons that automatically add 5, 10 or 15 tickets to cart */
/* to use this HTML / PHP code, copy it to your child theme functions.php file */
add_action( 'woocommerce_after_add_to_cart_button', 'additional_simple_add_to_cart', 20 );
function additional_simple_add_to_cart() {

    global $product;

    if ( wc_lottery_use_answers( $product->get_id() ) ): ?>

        <script>
        jQuery(document).ready(function($){

            $(document).on('click','.lottery-pn-answers li',function(e){
                var answer_id = $(this).data('answer-id');
                var aelement = $('a.single_add_to_cart_button-5');
                var old_url = aelement.attr("href");
                var new_url = old_url + "&lottery_answer="+answer_id;
                aelement.attr("href", new_url);

                var aelement = $('a.single_add_to_cart_button-10');
                var old_url = aelement.attr("href");
                var new_url = old_url + "&lottery_answer="+answer_id;
                aelement.attr("href", new_url);

                var aelement = $('a.single_add_to_cart_button-15');
                var old_url = aelement.attr("href");
                var new_url = old_url + "&lottery_answer="+answer_id;
                aelement.attr("href", new_url);
            });

        });
        </script>
        <?php endif; ?>
        <br><br>
        <a rel="no-follow" href="?add-to-cart=<?php echo esc_attr( $product->get_id() ) ?>&amp;quantity=5" class="single_add_to_cart_button-5 button alt">Add 5 Tickets</a>

        <a rel="no-follow" href="?add-to-cart=<?php echo esc_attr( $product->get_id() ) ?>&amp;quantity=10" class="single_add_to_cart_button-10 button alt">Add 10 Tickets</a>

        <a rel="no-follow" href="?add-to-cart=<?php echo esc_attr( $product->get_id() ) ?>&amp;quantity=15" class="single_add_to_cart_button-15 button alt">Add 15 Tickets</a>
<?php
}