You are working for a certain candidate who is running a provincial election. This candidate finds out that you have taken a statistics course from a certain statistics professor, and assumes that you know a bit about statistics and sampling. The candidate asks you to take a poll in order to estimate the proportion of the voters who cast their vote for him/her with a margin of error of 0.035. You take it upon yourself to take a simple random sample of nn voters. How many observations do you need for a 90% confidence interval? Assume that a recent survey showed 47% of voters have supported him/her.