$this->speed = $speed . "mph"; $this->fuel = $fuel; $this->mileage = $mileage . "mpg"; if ($price > 10000) { $this->tax = 0.15; } else { $this->tax = 0.12; } } function display_all() { echo "Price: " . $this->price . "<br>"; echo "Speed: " . $this->speed . "<br>"; echo "Fuel: " . $this->fuel . "<br>"; echo "Mileage: " . $this->mileage . "<br>"; echo "Tax: " . $this->tax . "<br>"; } } $car1 = new car(2000, 35, "Full", 15); $car1->display_all(); $car2 = new car(2000, 5, "Not Full", 105); $car2->display_all(); $car3 = new car(2000, 15, "Kind of Full", 95); $car3->display_all(); $car4 = new car(2000, 25, "Full", 25); $car4->display_all(); $car5 = new car(2000, 45, "Empty", 15); $car5->display_all(); $car6 = new car(20000000, 35, "Empty", 15); $car6->display_all();