The average maturity of the liabilities of an FI's balance sheet is equal to the weighted-average of the liabilities where the weights are determined relative to the total assets of the FI. the weighted-average of the liabilities where the weights are determined using market values of liabilities. the weighted-average of the liabilities where the weights are determined relative to the total liabilities of the FI. the weighted-average of the liabilities where the weights are determined relative to the total liabilities and equity of the FI. None of the options.