Please solve

Newspaper headlines proclaimed that candy lovers live longer following the publication of a study in the British Medical Journal. Researchers sent a health questionnaire to men who entered Harvard as undergraduates before 1950. Of the 3312 respondents that said they almost never consumed candy 247 had died by the end of the study and of the 4529 that said they did consume candy 267 had died by the end of the study. Compare the proportion of deaths in each group using a 95% confidence interval. A. What function did you use in the calculator? B. Assuming the first, third and fourth CLT condition holds, show that the samples are large enough: C. Provide the confidence interval