The following table contains the historic returns from large stocks and long-term Treasury bonds over the last 20 years. Analyze the risk-return trade-off that would have characterized these portfolios. Required: a. Calculate the average rate of return and standard deviation of the "Excess returns" after a continuous compounding transformation was performed. (Do not round intermediate calculations. Round your answers to 2 decimal places.) t. d. What were the average retum and standard devation of the minimum-variance combination of stocks and bonds? (Do not round intermediate calculations. Round your answers to 2 decimal places.)