anchor.diff:  	)
   
   ;QUESTION THREE
  +;Need documentation about each function
   	(defun mix (L1 L2)
   		(cond
   			((null L2) L1)
  
positive.code: 		)
  
  	)
  		
  ;QUESTION FIVE
  
  
  ;QUESTION SIX
  	(defun subsetsum (L S)
  		(cond 
  			((null L) nil)
  
negative.code: 	)
  
  ;QUESTION TWO
  ;Need documentation about each function
  	(defun flatten (X)
  		(cond 
  			((null X) nil)
  