Message from the grader in the course:

Hello class, sorry about the delay in the checking of exercises 3 and
4. My computer was broken. Now there should be no problem with the
automatic answer and the checking of exercises. It's very important
that you write, in the email you send me, a subject containing the
word "targil", otherwise it is difficult for me to find your mail, and
also there is no automatic reply if you don't write "targil" in your
email. I also got "undelivered mail" replies from some of your email
addresses. Some of you should check your mailbox for space and for
filters of what email you are allowed to get. When you send me your
emails, please don't forget to write me your i.d., not only in the
names of the files, but in the email itself also. For a better
understanding of the course material I advise you to read also the
Numerical Recipes book. It is on the net:
http://www.library.cornell.edu/nr/cbookcpdf.html 
and also in the library. The book is a bit difficult and maybe you
won't understand every line, but you can get a better understanding
from it and it helped me get a good grade in the course two years ago.