(a) (4 points) What is the five number summary of years of education in 1993 for people in this sample? Use a STATA command to answer the question and attach its output. (b) (5 points) Summarize numerically and graphically the distribution of variableurban. Show the STATA commands and their outputs. Interpret the outputs. (c) (2 points) What fraction of observations have access to 2 health care centers in 1993? What fraction of observations have access to at most 2 health care centers in 1993? (d) (4 points) The researcher calculates the weight-for-age z-score (WAZ score) using the mean and standard deviation of weight of children of the same age and sex. Create a scatter-plot of waz on weight for girls with ageyr taking value 1, that is, for one-year-old girls. (e) (4 points) Browse the values of weight and weight-for-age z-score for one-year old girls. Based on these values, solve for the unknown population mean and standard deviation the researcher must have used to calculate the weight-for-age z-scores for this group of children.