Create a class Ball. Ball objects should accept one argument for "ball type" when instantiated. If no arguments are given, ball objects should instantiate with a "ball type" of "regular." ball1 = Ball() ball2 = Ball("super") ball1.ball_type #=> "regular" ball2.ball_type #=> "super"

class Ball():
  def __init__(self, ball_type="regular"):
    self.ball_type = ball_type