1) Write me a perl program.  If the file given on the command line exists, print "Yes" else print "No".
 
 
 
 
 
 
 
 
 
 
 

2) Write the following expression in Lisp:  3+2 * 1 + 5 - 3 * 2
 
 
 
 

3) Compute the square root of x.  Write the function (sqroot num diff).  It should return the square root of num accurate to at least diff.
How?  Use newton's method.
     GUESSnew = (GUESSold + num/GuessOLD) /2
     Difference < GuessNEW * GuessNEW - num * num
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

4) Write me the function (order? list).  It should return 1 if the list is in order, or 0 if it is not.  The null list by definition is in order.