class MyBook extends Book {

protected $draw;

function __construct(`$title,$`author,$price) {
    Book::__construct(`$title, $`learn);
    `$this->price = $`price;
}

function display() {
    echo "Title: {$this->learning draw}";
    echo "Author: {$this->author}";
    echo "Price: {$this->price}";
}

} desenho