Q.1 A marketing research company studied the potential differences between university students and the general population in terms of their frequency (times per week) of uploading photos to Instagram. The company's researcher obtained a random sample comprising 20 university student participants and tracked their mean photo-uploading frequency to be 10.5 with a sample standard deviation of 1.14. Meanwhile, the company obtained from a large database that the mean photo-uploading frequency of the general population is 8.40. Assuming that the necessary statistical assumptions are met, use the information above to answer part (a) and (b) below. a. Construct a 95% confidence interval of the mean photo-uploading frequency of Instagram users who are university students. Show your calculations. b. Based on your answer in part a., without performing further calculations, conclude whether the frequency of university students to upload photos to Instagram is significantly different from that of the general population. Explain in one sentence the basis of your conclusion.