2) A linear model was proposed to relate the top offensive linemen for the NFL draft to their times in the 40-year dash. Load the data into Stata using the command use http://people.fas.harvard.edu/~mparzen/stat104/nfldata.dta a) Create a scatter plot. Does there appear to be a linear relationship? b) What is the value of R-sq? Would you say it is a high or low value? c) Test the hypothesis HB=0H B0. Fully explain your conclusion. d) Does this appear to be a useful model? Explain.