(a) [8 marks] Based on the data description, which variables are qualitative variables? Read the whole data set into R. Are these qualitative variables shown as factor objects in R? If not, manually convert them to factor objects. For each qualitative variable, how many observation does each group have? For each of these qualita- tive variables, provide boxplots for the price of land sales, acrePrice, across the different groups of each qualitative variable. Compare the group difference and Summarize your findings