Assume that you are to design a sample of retail stores to continuously track the sales of various grocery products sold in all such retail stores in a big developing country. The country is big in geography and human population, and it has currently unknown number of stores carrying grocery products from millions of small mom-and-pop stores to thousands of large supermarkets. Outline how you would approach (i.e., what you would do about) this research's population, sampling frame, and sampling methodology. can you answer this question not using AI? Thank you