4. a) Develop at least one research question and relevant hypotheses for the following problem statements: i. The impact of perceived usefulness of online reviews, trust, and perceived risk on online purchase intention in emerging markets: Bangladesh perspective. ii. Social media marketing activities enhancing consumer perception of brands: An empirical analysis. b) Write the in-text citation and references for listing in the research report by using APA format considering the following information: i. Title: Impact of Relationship Marketing on The Business Growth of Mobile Telecom Industry: An Empirical Study from Bangladesh Perspectives Journal: DU Journal of Marketing Volume: 16 Number: 2 Page(s): Page 50 to Page 74 Year: 2016 Author(s): Abu Naser Ahmed Ishtiaque and Surajit Sarbabidya ii. Title: Marketing Research, An Applied Orientation Author(s): Naresh K. Malhotra Publisher: Prentice Hall Inc. Publishing Place: New Delhi Edition: Seven Year: 2016 iii. Title: WTO Report Shows Food Safety Dominates New Trade Concerns Author(s): Joe Whitworth Website: https://www.foodsafetynews.com/report2021 Posted: August 27, 2021 Visited by Researcher(s): 05 September 2021 c) Write in one sentence the purpose of using the following statistical tools for analyzing collected survey data: i. Cronbach Alfa ii. Chi Square Test iii. Correlation iv. Regression V. ANOVA