You are given the following information regarding prices for a sample of stocks. PRICE Stock Number of Shares T T + 1 A 3,700,000 $64 $78 B 11,000,000 24 38 30,000,000 20 25 a. Construct a price-weighted index for these three stocks, and compute the percentage change in the Index for the period from to T + 1. Do not round intermediate calculations. Round your answer to two decimal places. % b. Construct a value-weighted index for these three stocks, and compute the percentage change in the Index for the period from 1 to 7+ 1. Do not round intermediate calculations. Round your answer to two decimal places. %