(a) Create a new model with a SETUP procedure that creates turtles.
(b) Create a slider that controls the number of turtles created.
(c) Write a GO procedure that makes the turtles wander around the screen randomly.
(d) Change the GO procedure to make the turtles afraid of each other.
(e) Make the turtles die when they reach the edge of the screen.
(f) Create a plot that displays the number of turtles.