Consider the three stocks in the following table. Pt represents price at time t, and Qt represents shares outstandin at time t. Stock C splits two for one in the last period. Calculate the first-period rates of return on the following indexes of the three stocks ( t=0 to t=1) : (Do not round intermediate calculations. Round your answers to 2 decimal places.) a. A market-value-weighted index. b. An equally weighted index