Hadbucks National Bank Current Balance Sheet Appears Below

Hadbucks National Bank current balance sheet appears below. All assets and liabilities are currently priced at par and pay interest annually. What is the weighted average maturity of assets?

A) 5.50 years.
B) 6.40 years.
C) 5.00 years.
D) 4.60 years.
E) 10.0 years.