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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def left(self, speed=1):
 """ Make the robot turn left by running the right motor forward and left motor backward. :param float speed: Speed at which to drive the motors, as a value between 0 (stopped) and 1 (full speed). The default is 1. """

        self.right_motor.forward(speed)
        self.left_motor.backward(speed)