4. a candidate for a us representative seat from indiana hires a polling firm to gauge her percentage of support among voters in her district. a. if a 95% confidence interval with a margin of error of no more than 0.04 is desired, give a close estimate of the minimum sample size necessary to achieve the desired margin of error. (remember to round up any result.) b. if a 95% confidence interval with a margin of error of no more than 0.01 is desired, give a close estimate of the minimum sample size necessary to achieve the desired margin of error.