(1) Log in: fill in the box which says "name", type in your password - this
will not be echoed so nobody can easily snoop on what you are typing. Login
name is usually first initial followed by last name, the total is truncated to
8 characters. The password is your student ID if you have not logged in
before.

(2) Start up Scheme:  Type

    scheme

in your xterm window.

(3) Write a function to square a number.

(4) Test it out.