Can you please help me with this homework I don't understand

to test the profitability of name changes in the more recent market, we analyze the stock prices of a large sample of corporations shortly after they changed names, and we find that the mean relative increase in stock price was about

0.74%, with a standard deviation of 0.20%.

1. at least 36% of the relative increases in stock price lie between %.____ and %._____

. Round 2 decimal places.

2. at least ?_____ of the relative increases in stock price lie between 0.34 % and 1.14 %.

3.Suppose that the distribution is bell-shaped. According to the empirical rule, approximately _____ of the relative increases in stock price lie between 0.34 % and 1.14 %.

4 Suppose that the distribution is bell-shaped. According to the empirical rule, approximately 68% of the relative increases in stock price lie between %.___ and %___

.