Hello, Can you please help me solve this question.

A company that advertises on the Web wants to know which search engine its customers prefer as their primary search engine: Google or Bing. Specifically, the company wants to know whether the preference depends on the browser being used. The file P08_25.xlsx contains counts of 800 customers' favorite search engine, broken down by the browser used.

Round your answers to three decimal places and if your answer is negative value, enter "minus" sign.

a. Calculate a 95% confidence interval for the difference between two proportions: the proportion of Internet Explorer users whose favorite search engine is Google minus the similar proportion of Firefox users.

Lower Limit
Upper Limit

b. Calculate a 95% confidence interval for the difference between two proportions: the proportion of Internet Explorer users whose favorite search engine is Bing minus the similar proportion of Firefox users.

Lower Limit
Upper Limit

https://view.officeapps.live.com/op/view.aspx?src=https%3A%2F%2Fcnow.apps.ng.cengage.com%2Filrn%2Fbooks%2Falba07h%2Fdatafile%2Fresource%2Fch08%2FP08_25.xlsx&wdOrigin=BROWSELINK