Question

Question was provided via image upload.

Explanation:

Identify the exercise requirements

The exercise is "3.2.5 Short Stack" in CodeHS Karel programming. The goal of this exercise is to write a program where Karel creates a "short stack" of tennis balls. Specifically, Karel needs to place a stack of 2 tennis balls on the starting spot, move forward one space, and place a stack of 4 tennis balls on the next spot.

Determine the required commands

The available commands on the left sidebar are:

• move();
• putBall();
• takeBall();
• turnLeft();

Construct the program sequence

1. Place 2 balls on the starting spot:

putBall();
putBall();

1. Move to the next spot:

move();

1. Place 4 balls on the second spot:

putBall();
putBall();
putBall();
putBall();

1. Move forward to finish:

move();

Answer:

/* This program has Karel create a short stack of tennis balls.
 * Karel places 2 balls on the first spot, moves, and places 4 balls on the second spot. */
putBall();
putBall();
move();
putBall();
putBall();
putBall();
putBall();
move();