(5 points) Problem #2. An environmentalist is interested in estimating the proportion of all households in Sonoma County that recycle at least some of their household waste each week. She is interested in forming a 94% confidence interval with a 7% margin of error. (a) What is the population of interest to the researcher? Use clear, complete sentences and be specific. The pololation (b) What is the parameter of interest to the researcher? What is the correct symbol for the parameter of interest? (c) Determine the necessary sample size if no prior estimate of the proportion is available. (d) Determine the necessary sample size if the prior estimate of the proportion is 0.43