A survey of 200 taxi drivers in Abu Dhabi city found that 40 of them have high blood pressure

A) find point estimator for the proportion of taxi drivers who have high blood pressure

b)what is the shape of sampling distribution of sample preparation of taxi drivers who have high blood pleasure,why?

c) find the 90% confidince interval of the population preparation of taxi drivers who have high blood pleasure>

d) what sample size should be taken if we wish to be 90% confident that the margin of error within 4% of true properation