In 1987, Indonesia did a national survey to study the use of contraceptives. They sampled married women who were not pregnant. Below is the table of the data collected. Education Level \\ Contraceptive Use No Yes Total low 279 207 486 high 350 637 987 Total 629 844 1473 (a) Obtain the 95% confidence interval for the proportion of married Indonesian women with a low level of education that use contraceptive methods