Consider the following procedures, which are used to control a device that draws lines on paper.
Procedure CallExplanationpenDown()Places the device's pen on the paper so that a line is drawn when the device movespenUp()Lifts the device's pen off of the paper so that no line is drawn when the device movesgoForward(x)Moves the device forward x unitsturnRight(x)Rotates the device in place x degrees clockwise (i.e., makes an in-place right turn)
Consider the goal of using the device to produce the following drawing, where each line shown has a length of 10 units and the horizontal lines are 10 units apart.
The device is positioned at the upper-left corner of a sheet of paper and is facing right. Which of the following code segments will produce the drawing shown?
penDown()
goForward(10)
penUp()
turnRight(90)
goForward(10)
turnRight(90)
penDown()
goForward(10)
