detail explanation

A benchmark market value index is comprised of three stocks. Yesterday the three stocks were priced at $22, $30, and $70. The number of outstanding shares for each is 670,000 shares, 570,000 shares, and 270,000 shares, respectively. If the stock prices changed to $26,$28, and $72 today respectively, what is the 1-day rate of return on the index? 4.10% 3.04% 6.49% 4.84%