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<!DOCTYPE html> <html> <body> <script> class Car { constructor(name) { this.brand = name; } present() { return 'I have a ' + this.brand; } } class Model extends Car { constructor(name, mod) { super(name); this.model = mod; } show() { return this.present() + ', it is a ' + this.model } } const mycar = new Model("Ford", "Mustang"); document.write(mycar.show()); </script> </body> </html>