Consider the following rates ot return. 14.50 446 19.39 4 14.29 544 37.10 a. Calculate the anthmetic average returns tor large-company stocks and Tbils over this period. (Do not percent rounded to 2 decimal round intermediate calculations and enter your answers places, e.g. 32-16) Lar b. Calculate the standard deviation of the returns for large-company stocks and rbas over this period Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, for the large company stocks versus the Tbas What was the arthmetic ma premium over this period? (A answer should be indicated by a minus sign. Do not round caloulations and enter your answer as ed to 2