Rules about submission of Matlab codes

                                       yourname_hw#_p#.m
        Here  "yourname"  can be any character string identifying you
         (uniquely within this class),
        and hw# and p# are the numbers of the HW assignment and the problem.
        For example, a code by a hypothetical student named John Smith for
        Problem 3 of HW 4 can be named   John_hw4_p3.m .  If John writes a
        function code used by the main code 
John_hw4_p3.m, that function code
        should be named   John_fun4_hw4_p3.m  (here the "fun4" is an optional
        suggestion, but the "John" is a mandatory part of the code's name).