Is climate change a major issue in Pacific Island Countries (PICs)? To answer this question, a researcher surveys 1200 randomly selected individuals in PICs. Suppose 800 of the sampled people responded that climate change is a major issue for them. . a) Construct a 95% confidence interval to estimate the population proportion of individuals in PICs who feel that climate change is a major issue for them. (7 marks) b) Assume there are 800,000 populations in PICs. What is the minimum number of people in PICs that are concerned about climate change