As your data set does not include Vietnam, you decided to collect some data at the household level about the birth rate as well as some sociodemographic and economic characteristics of the households in Vietnam. For this purpose, a survey of a representative sample of Vietnamese households is needed. Briefly describe how you would conduct the survey, what type of sample you would use and why, the possible errors you may face while conducting the survey and how you could reduce/eliminate such errors. (Note: You do not need to prepare the actual survey questions)