First National Bank of North America (FNBNA) Assets Liabilities and Equity Amount Rate of ($'millions) Return Amount Rate of ($'millions) Retum Cash 10 0% Core Deposits 80 5% Investments 30 6% Borrowings 10 7% Loans 60 9% Equity 10 TOTAL 100 TOTAL 100 If FNBNA is expecting a $20 million net deposit drain, and the securities liquidity index is 0.97, how many securities would have to be liquidated it the bank used only its securities to fund the expected deposit drain