A bank is considering two investment portfolios composed of a mix of government securities (federal and municipal securities). The first portfolio has a return of 6% with probability 0.9 and returns of 5% and 7% with 0.05 probability. The second portfolio has a return of 5% with probability 0.5 and a return of 7% with probability 0.5. Which portfolio has the better combination of return, risk, and liquidity?