Consider the following performance data for two portfolio managers (A and B) and a common benchmark portfolio BENCHMARK MANAGER A Weight Return MANAGER Weight Return Weight Return Stock a. Calculate (1) the overall return to the benchmark portfolio, (2) the overall return to Manager A's actual portfolio, and (3) the overall return to Manager B's actual portfolio. Brien comment on whether these managers have under or outperformed the benchmark und Round your answers to two decimal places. Use a minus sign to enter negative values Overall return Benchmark Manager A Manager B Manager A has Select the benchmark fund. Manager B has the benchmark fund. b. Using attribution analysis, calculate (1) the selection effect, and (2) the allocation effect for both Manager A and Manager B. Using these numbers in conjunction with your results from Part a comment on whether these managers have added value through their selection skills, their allocation skills, or both. Do not round intermediate calculations. Round your answers to two decimal places. If the answer zero, enter "0 Selection effect Allocation effect Manager A Manager Manager A has added value through his/her Select Manager has added value through his/her Select