I would think long and hard about this. Is it reported as small business because of non-farm, non-residential collateral?
If it is not real estate secured, I would really ponder if it should be classified as a business purpose loan under 4a vs a personal loan to pay off a business loan workout (if it is to an entity, then it will stay under 4a and I won't get into credit issues.)
If the loan is classified properly, then report as under $1 million, just as you would an operating business with no sales.
3 is used for unknown (you do not know).