[racket] Missionaries and cannibals  From: Ken Hegeland (hegek87
at yahoo.com) Date: Mon Nov 29 12:55:32 EST 2010  The exercise
can be found at:http://htdp.org/2003-09-26/Book/curriculum-
Z-H-40.html#node_sec_32.2  I am stuck at 32.2.6-.7  I originally
had some information incorrect and was able to get mc-solution
working correctly, except it didn't need someone to remain on
the boat at all times. So it just moved 1m 1c, than 2m, and
finally 2c. I found out why this happened and edited the
possible-move function to take into account the boat position
before making calculations. This worked great but now I am
having trouble getting mc-solution working correctly. I didn't
do it exactly as the book wanted, instead I had a helper
function which determined if some state could reach a final
state, if it could, it produces true. To get mc-solutions to
produce the list of moves to final I used the first function and
tested it at every step, if it returned true, I added the state
to an accumulator. When I reached a fin