(Q9.b) A sample of 30 part-time "UbLyft" workers had mean annual earnings of $14,120 with a standard deviation of $1,577. Construct a 95% confidence interval for the population mean, J. Assume the population has a normal distribution. Round to the nearest dollar. a) Write out the interpretation sentence for this interval. b) Then write a sentence about how this could be helpful if you are considering working part-time for this company. c) Explain briefly how you got your confidence interval values. (note -- if doing these by hand, use "t" not "z")