Assume you have created a mechanical arm that can hold a pen. The arm can perform the following

tasks:

§  Lower the pen to a piece of paper.

§  Raise the pen from the paper.

§  Move the pen one inch along a straight line. (If the pen is lowered, this action draws a one-inch line from left to right; if the pen is raised, this action just repositions the pen one inch to the right.)

§  Turn 90 degrees to the right.

§  Draw a circle that is one inch in diameter.

Draw a structured flowchart or write pseudocode describing the logic that would cause the arm to draw the following:

a. a one-inch square

b. a two-inch by one-inch rectangle

c. a string of three beads

Have a fellow student act as the mechanical arm and carry out your instructions.