Stock A Stock B Stock C P. $70 $85 |$105 Q. P Q1 P2 200 $72 200 $36 500 $81 500 $81 300 $98 300 $98 Q2 400 500 300 Based on the information given for the three stocks, calculate the first-period rates of return (from t = 0 to t= 1) on A. a market-value-weighted index. B. an equally weighted index