Determine the result of the following Python expressions and statements.
For most of these problems you can check the answer by running Python.  
However, there will be a QUIZ with similar questions on Tuesday 2/12


1.  Determine if the following lines represent valid python EXPRESSIONS,
    STATEMENTS, or NEITHER.  Furthermore, if it's an expression, determine
    the type of the expression (int, float, string, boolean, tuple, etc ...)


    a. x = 2
    
    b. x == 3  # assume x has been defined

    c. True and x>5
 
    d. print "hello"

    e. "hello"+"world"

    f. "hello"+2

    g. 3.0


2.  Determine or Describe the result of executing the following:
    (the questions follow one another)

    a. x = 3
    b. y = 5
    c. z = 3.0
    
    d. 3/2

    e. 14 % 6

    f. 3/4*20

    g. 3*20/4
    
    h. 3/4.0*20

    i  z/4*20

    j  "3.0"/4*20

    k  x == 3 or x == 4

    l  y = x+1
       print y

    m  x = x + y
       print y

    n  if x<y:
       	  print "A"
	  print "B"
       print "C"

    o  if x<y:
       	  print "A"
       print "B"
       print "C"

       # DON'T JUST NOTE THE ANSWER. TRY TO UNDERSTAND WHY!

    p  if x<=x:
          if x>0:
	     print "A"
	  else:
	     print "B"

    q  if x<=x:
          if x>0:
	     print "A"
       else:
	  print "B"

    r  (optional) 
       for i in [2,4,6,8,10]:
       	   print i+1
       print "i is now ", i

    s  i = 1 
       ax = 0
       while i<=10:
       	   ax = ax + i
	   i = i+1
       print ax