\fDo smokers have lighter babies? Use the data le \"Birthweight_reduced_kg_R.csv\" (which was also used in Assignment 1) to investigate this question, addressing each of the following parts. a) Is this a paired or unpaired situation? b) Calculate the summary statistics relevant to this problem. c) Use a parametric test to determine whether there is any difference between the birth weights of the two groups. State clearly the null and alternative hypotheses and show all steps in the hypothesis test. Present calculations by hand and Excel output to check your answer. (1) Use a nonparametric test to determine whether there is any difference between the birth weights of the two groups. State clearly the null and alternative hypotheses and show all steps in the hypothesis test. e) Which of the two tests is most appropriate here, and why