public $price;

public $max_speed;

public $miles;

public function __construct($price_val, $max_speed_val) {

echo "You made a new bike!<br>";

$this->price = $price_val;

$this->max_speed = $max_speed_val;

$this->miles = 0;

}

public function displayInfo() {

echo "<u>INFO</u><br>";

echo "-Price: $".$this->price.'<br>';

echo "-Max Speed: ".$this->max_speed.' mph<br>';

echo "-Miles: ".$this->miles.' mi<br>';

return $this;

}

public function drive() {

echo "*You drive 10 miles across the screen!*<br>";

$this->miles += 10;

return $this;

}

public function reverse() {

echo "*You back up 5 miles across the screen!*<br>";

$this->miles -= 5;

if($this->miles < 0) {

$this->miles = 0;

echo "~OOPS! You backed up too far and hit the wall!~<br>";

}

return $this;

}