Define federal funds, federal funds market, and federal funds rate.

Federal funds are funds of a (depository/non-depository) nature, which can be used as a (temporary/permanent) source of funds for banks and represent (an asset/a liability) to the borrowing bank and (an asset/a liability) to the lending bank that sells them.

The federal funds market is a source of (depository/non-depository) funds, which allows depository institutions to accommodate the (short-term/long-term) liquidity needs of other financial institutions.

The federal funds rate is the interest rate charged in the federal funds market, which is usually (different/the same) for all banks borrowing in this market.