The population proportion of voters in favour of a particular political candidate was estimated based on a representative sample of 155 voters. Of the 155 voters in the sample, 71 voters expressed their support of the candidate. (Al) Define the point estimator for the population proportion and compute the estimate based on the sampling data. Show your work. (1 mark) (A2) What is the sampling distribution of the point estimator of (Al)? State and verify any required conditions. (1 mark) (A3) Find the 95% confidence interval of the proportion in favour of the candidate based on the Excel output below. Show your work and present the math formula for the calculation. (1 mark) Sample 0.458 Confidence Interval proportion Estimate Sample size 155 0.078 Confidence level 0.95 Lower confidence limit Upper confidence limit