if the correct answer is -1.8%, bond return on portfolio is 0.5 and stock return on portfolio is 0.5, what are the weights and returns for indexes with formulas

In a particular year, Razorback Mutual Fund earned a return of 1% by making the following investments in asset classes: Weight Return Bonds 20% 5% Stocks B80% 0% The return on a bogey portfolio was 2%, calculated from the following information. Weight Return Bonds (Lehman Brothers Index) 50% 5% Stocks (S&P 500 Index) 50% -1% The contribution of asset allocation across markets to the Razorback Fund's total excess return was Select one: A. -1.00%. % B. 1.00%. C. 0.80%. D. -1.80%. E. -0.80%