1.6 Give a prefix representation of a proposition, of the form prop ('OR', True, False). Write a function named evaluation, which will evaluate the proposition. You should use the functions defined in questions 1.1-1.5 def evaluation(formula): Test your evaluation function with the following: print "Simple Evaluation Function Test" print p = True q = False print "p =", p print"q-",q print print "(p or q): ", evaluate (('OR', p, q)) print "(p and q): ",evaluate (AND', p, q)) print "(p->q): ",evaluate ((IF', p, q)) print "(pq): "evaluate ((IFF, p, q)) print"-p evaluate (('NOT, p)