The general fund of a city reports assets of $$300,000$ and liabilities of $$200,000$ in fund financial statements. Explain what is meant by each of the following balances: fund balance$$nonspendable of $$40,000,$ fund balance$$restricted of $$28,000,$ fund balance$$committed of $$17,000,$ fund balance$$assigned of $$4,000,$ and fund balance$$unassigned of $$11,000.$