Eastern Bank holds assets and liabilities whose average duration's and dollar amounts are as shown in this table: Asset and Liability Items Avg. Duration(yrs) $ Amount... Investment Grade Bonds Commercial Loans Consumer Loans 15.00 3.00 6.00 $75.00 $500.00 $350.00 Deposits Non-deposit Borrowings 2.10 0.35 $450.00 $250.00 What is the weighted average duration of Eastern Banks asset portfolio and liability portfolio