the competitive part of the bonus exercise has now ended,
with 17 wrong guesses and 53 correct guesses, giving 53 students a 20 or 15 point bonus to the grade of HW6 (the first student to guess a picture wins 20 points, later guesses win 15 points). the last picture was correctly solved after 6 days.
a complete list of winners will be published shortly.
good job to all those who participated!