Please check your marks.
Assignment 4 has been marked. Please check your marks and read the feedback online.
Once again, your final mark will be the sum of the marks from all the five programming assignments (with the bonus assignment mark added on the top). No assignments are compulsory in the sense that you will pass the course as long as your final mark is >= 50.
To give everyone more time to work on Assignment 5, its spec has just been released.