Clarification for Exercise 3b

Just a quick clarification for question 1.1 that someone asked me about yesterday: the hint says you should find 6 lexical rules (rules with a word as the RHS) and 6 syntactic rules. This does *not* include the extra START -> S rule that you add. There really are 6 unique syntactic rules in those trees - count carefully! I have updated the exercise PDF to make this clearer.