A 2021 study looked at a random sample of 800 canadians between the ages of 18 and 24 years, and asked them the following yes or no question: "When nothing is occupying my attention, the first thing I do is reach for my phone." 77% responded yes to this question. a) Construct a 90% confidence interval for the true percentage of all Canadians between 18 and 24 years of age that reach for their cellphones when nothing is occupying their attention.

b) Write a proper interpretation (in context) of the of the confidence interval. Be sure you write complete sentences:

d) Using the above scenario, test the claim that more than 75% of all canadians in this age group would respond "yes" to the given statement. Use a 0.05 level of significance and draw an appropriate conclusion that addresses the original claim in context. Be sure you state clearly your null and alternative hypothesis and the final wording: