The advancement of the internet service has contributed to the growth of the e-commerce. Many retailers have thus switched their business to online platform. Covid-19 pandemic have brought a huge impact on digital marketing. Many essential products are turned to online platform with delivery services provided. This pandemic has also changed people shopping behaviour from bulk buying to online buying. The marketing manager of a local essential retailer is interested to investigate the purchase behaviour of their customers towards buying their product online. A survey will be used for data collection. The marketing manager intend to know how the time, product variety, perceived convenience, perceived trust, and perceived privacy impact consumer's online purchase behaviour. (b) (c) As a member of the marketing team, you are required to propose on the most appropriate sampling method to the marketing manager with your justification. (5 marks) Develop the research framework based on the above scenario. (5 marks) Advise the marketing manager on the principles for ethical research that involve humans that should be followed. List TEN principles. (5 marks)