Part lof3 (a) Find a point estimate for the population proportion of people who performed volunteer work in the past year. Round the answer to at least three decimal places. The point estimate for the proportion of people who performed volunteer work in the past year is ' 0,3979 '. Part2 of3 (b) Construct a 99% confidence interval for the proportion of people who performed volunteer work in the past year. Round the answers to at least three decimal places. A 99% confidence interval for the proportion of people who performed volunteer work in the past year is '03630 '