Please show all work and explanation. Thank you and I will upvote.

Q2. You are testing two versions of a software interface: Version 2.?a and Version 2.7b. Management believes that people are equally satisfied with the two versions. You want to challenge this idea, but you're not sure whether users prefer 2.?a or 2.7b. On average, you expect about 513% of the users will express high satisfaction with either interface. Management indicates that if the high satisfaction rates are within 10%, they consider them equally acceptable they only want to know if the high satisfaction rates differ by more than 10%. a. How many observations should you have from each population {users of Version 2.?a and users of Version 2.7b] in order to be able to detect a difference of at least 1t]%. with 30% power. in the proportion of respondents that indicate \"high satisfaction" with the interface? Check your calculation with R. b. If you expect a 30% response rate to your surveyI how many people should you survey for each interface? c. Suppose you send out the number of surveys you calculated in 3a, and get a response rate of 35% for both surveys. Of the surveys returned. 55% indicated high satisfaction with Version 23a, and 46% indicated high satisfaction with Version 1Tb. Given this data conduct a tworsaniple test of proportions where \"mm -m = '1] which 'Fz * and p1 refers to the proportion of people who expressed high satisfaction for Version 2.?a, and p2 refers to the proportion of people who expressed high satisfaction for Version 1Tb. Draw a conclusion using a = 0.10. Check your answer with R. d. Your boss asks you which version to use. What evidence do you have for using one version or the other