Bonus Marks

• Create a Macro to aid specifically with reporting type errors.
• Create a Macro to aid specifically with reporting argument count errors.
• Create a Macro to aid specifically with reporting empty list errors.
• Change printing a builtin function so that it prints its name.
• Write a function for printing out all the named values in an environment.
• Redefine one of the builtin variables to something different.
• Change redefinition of one of the builtin variables to something different an error.
• Create an exit function for stopping the prompt and exiting.