Bonus Marks

• › Create builtin logical operators or ||, and && and not ! and add them to the language.
• › Define a recursive Lisp function that returns the nth item of that list.
• › Define a recursive Lisp function that returns 1 if an element is a member of a list, otherwise 0.
• › Define a Lisp function that returns the last element of a list.
• › Define in Lisp logical operator functions such as or, and and not.
• › Add a specific boolean type to the language with the builtin variables true and false.