Using Matlab please help solving 13.7 , comments needed. use Data from 13.1

Problem 13.7 Fit the data from Problem 13.1 with first-, second, third-, and fourth-order polynomials, using the polyfit function: Plot your results on the same graph. Plot the actual data as a circle with no line. Calculate the values to plot from your polynomial regression results at intervals of 0.2 m3. Do not show the calculated values on the plot, but do connect the points with solid lines. Which model seems to do the best job