The second assignment, ignoring the parts
that most of you completed in class, was:

1. Discovering primes.
   Starting with a function that tests whether
   one number is a divisor of another, work up
   through a function that lists all divisors,
   then one that simply works out if there are
   any divisors, then one that works out if n
   is prime, to finally one that lists all
   prime numbers in a particular range.

2. Plot two graphs f(x) and g(x) on the same 
   axes so that the user can see approximately
   where they intersect. The user then requests
   a new plot of the same functions but over a
   smaller range of x values, gradually converging
   on the x value where the two functions are
   equal, this visually solving the equation with
   computer aid.

3. Any of the non-optional problems not done from
   the first assignment.