Wake County, North Carolina has recently experienced tremendous growth. A real estate developer takes a random sample of 100 residential real estate plots and records various features about the plot such as its square footage, appraised value, and so on. The developer wants a 90% confidence interval for the mean square footage of residential real estate in Wake County, NC. Use the square footage data of the 100 randomly sampled plots available in the data file WakeCountySqFt.xIsx @ to calculate the confidence interval. Use this information for all the parts. Part 1: Input the lower bound. Question 29 0.5 pts Part 2: Input the upper bound.