A group of research from UNIMAS aim to conduct a research about the mental health of Malaysia students during COVID-19 pandemic. It is built form a phenomenon that several students become easily to angry and agressive in the pandemic period. Their research period is from 30th June 2020 until 30th June 2021. The Malaysia ministry of Education report that 80% of Malaysian students are female, and the researchers aims to meet that demography. It is expected the popluation proportion of the students is 70%. the researcher wishes to have and error of less than 5% and to be 95% confident of an estimation.
(i) Expain why non-response error might incur from the research. (3 m)
(ii) Explain why snowball sampling will be a wrong technique for the case above. Elaborate. (2 m)

(i) Calculate the sample SIze from above information. (2 m)
(ii) if descriptive research is not the best research design for the case above, discuss the suitable research design for it. Elaborate. (3 m)