Consider the three stocks in the following table. Pt represents price at time t, and Qt represents shares outstanding at time t. Stock C splits two for one in the last period.

P0 Q0 P1 Q1 P2 Q2

A 145 155 150 155 150 155

B 135 310 130 310 130 310

C 270 310 280 310 140 620

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. Rate of return is ________%

b. An equally weighted index. Rate of return is __________%