The homework construction and marking procedure:

1)  Make up questions in exambank.tex.
2)  Create  homexx.tex file.
3)  Copy to tmpa
4)  Run examsel.x in /course
5)  This creates a tmp.tex file for the hardcopy homework.
6)  Check hardcopy.
7)  Run home.x in /course and select 1 for homework.
8)  Copy tmpq to ~/Public/secure/home.html to create webcopy.
9)  Check webcopy.
10) Let student emails accumulate
11) Logon as sci100 with alias sci100m and usual password.
12) mail and then s * zxx.txt to collect the emials into a file.
13) Copy this zxx.txt file to a zhomexx.txt file in /sci100.
14) Prepend the key created by examsel.x and modify to account
    for the optional and omitted questions.
15) Run /course/markup.x to create tmpmkyy.
16) Check tmpmkyy.
17) Replace classmkyy.in with tmpmkyy.
18) Then run /course/mark3.x in private and public modes.

Sample key:  For home01.tex

Option:  0 means required
         non-zero means optional
         The first non-zero gives the number of optional questions required
           to be answered.

Omit:  0 means good question.
       1 means give everyone the mark.
       2 means omit the question altogether. 
Question  Answer  Option  Omit

key
    1    5    0    0
    2    1    0    1 
    3    3    0    0
    4    3    0    0
    5    1    0    0
    6    1    0    0
    7    4    0    0
    8    1    0    0
    9    2    0    0
   10    4    1    0
   11    5    1    0
   12    3    1    0