answers to the questions below?

5) A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 520 babies were born, and 286 of them were girls. Use the sample data to construct a 96% confidence interval estimate of the percentage of girls born. (7 points) (a) Find the critical value. (Round to two decimal places) (2 points) (b) Compute the margin of error with the formula. (Round to three decimal places) (2 points) (c) Construct the confidence interval. (Round to three decimal places) (2 points) (d) State a conclusion. (1 point)