The seatpos data is available in the faraway package in R. Download the data and answer the questions that follow. Present or attach the R codes and outputs used to answer the questlons. 1.1 Briefly describe the data clearly outlining the purpose of the study. (3) 1.2 Produce a numerical summary of the data. (3) 1.3 Suppose you want to explore the relationship between the hipcenter and the age of the respondent: i) Make a scatterplot of age and the hipcenter of the respondent. Comment on the relationship between the two variables. ii) Fit a simple linear regression model to the relationship. Give the fitted model and interpret the coefficients. iv) Conduct test of hypotheses on the regression coefficients and comment on their significance. v) Using the residual plots, investigate if the assumptions of the model were met or violated. (6)