8.4 You are going to take a random sample of voters in a city in order to estimate the proportion it who support stopping the uoridation of the municipal water supply. Before you analyze the data1 you need a prior distribution for 1r. You decide that your prior mean is .4. and your prior standard deviation is .l. {a} Determine the lactation, b) prior that matches your prior belief. {is} What is the equivalent sample size of your prior? {c} Out of the 100 cityF voters polled. y = 21 support the removal of u- oridation from the municipal water supply. Determine your posterior distribution