What is the weighted average maturity of assets?

The current balance sheet of Local National Bank appears below. All assets and liabilities are currently priced at por and pay interest annually, Assets Amount Annual Liabilities Amount ($millions) Rate (millions) Rate 1-year $60 17% |-year CD $50 bonds 12% $40 10-year $40 loan 2-year CD Equity $10 Total $100 Total $100