Q1:  4 marks 
Q2a:  4 marks
Q2b:  4 marks
Q3a:  4 marks
Q3b:  4 marks
Q4:  4 marks for machine
     2 marks for the (informal) explanation
Q5:  4 marks for machine
     2 marks for the (informal) explanation
Q6a:  4 marks
Q6b:  1 mark for each language
Q6c:  1 mark for correct answer
      2 marks for explaining it

Total:  40 marks.