Which of the listed changes would you make to the following PHP 4 code in order to make it most compliant with PHP 5? (Choose 2)

<?php

class Car {

var $model;

function Car($model) {

$this->model = $model;

} function toString() {

return "I drive a $this->model.";

}}

$c = new Car('Dodge');

echo $c->toString();

?>