(Section 4.1 # 26) In Exercises 25-30, determine whether the association between the two variables is positive or negative. 26. The age of a car and it's resale value. (Section 8.2 # 18) 18. A sample of size n = 44 has sample mean x = 56.9 and sample standard deviation s = 9.1. a. Construct a 98% confidence interval for the population mean . b. If the sample size were n = 30, would the confidence interval be narrower or wider? Show the work and be organized