draw an initial IS-LM-BP equiliberium. now put four points on the
graph. one is directly above the equileberium, one is to the right,
one is right under, and one is to the left. lable them a, b, c, and d.
for each piont explain the nature of the disequiliberium that would
exist in income and the interest rate were at levels consistent with
each point rather than thier equiliberium point.

Here is an example of a IS-LM-BP equilibrium: "IS-LM-BP Diagram"
Deardorff's Glossary of International Economics
http://www-personal.umich.edu/~alandear/glossary/figs/islmbp/islmbp.html

I am assuming that point A. is directly above the equilibrium, and the
rest of the points are labeled in a clockwise direction from there.

The following reference provides an excellent graphical view of how
equilibrium is restored in response to perturbations: "Effect of an
Increase in Aggregate Demand: Different Versions of the Short-Run AS
Curve" http://www.bized.ac.uk/stafsup/options/aec/pptmod/islmbp.ppt. 
From this reference we can see that points above the BP curve indicate
a surplus and points below the BP curve indicate a deficit, points
above the IS curve indicate overly high interest rates and points
below the IS curve indicate excessively low interest rates, and points
above the LM curve indicate that the money supply needs to contract
and points below the LM curve indicate that the money supply needs to
expand.

Therefore:

At point A., the balance of payments is in surplus, the interest rate
is too high, and the money supply is too large.

At point B., the balance of payments is in deficit, the interest rate
is too high, and the money supply is too small.

At point C., the balance of payments is in deficit, the interest rate
is too low, and the money supply is too small.

At point D., the balance of payments is in surplus, the interest rate
is too low, and the money supply is too large.

Sincerely,

Wonko