A. Janice wants to buy stock A whose return shows a mean of 2% and a standard deviation of 4% based on 250 daily returns. At the .05 level of significance (or 95% confidence level), she would like to test if the stocks daily return is equal to 5%. (a) write out the null and alternative hypothesis. (b) Compute the test statistic. (c) Should she reject or fail to reject the null hypothesis?