Part U Marks Open a new MATLAB script file and write a code to: (a) Plot the polynomial y-0.008 x-18x-5.4x+54 in the domain-6sxs 6. Use polyval function. (4 marks) Measurements of the fuel efficiency of a car FE at various speeds Vare shown in Table 1: Open a new MATLAB script file and write a code to: (a) Curve-fit the data with a third-order polynomial. (3 marks) (b) Make a plot of the points and the polynomial. Format your plot to be like Figure 5 7 marks) (c) Use the polynomial to estimate the fuel efficiency at 60 m/s (3 marks) Table I: Variation of fuel efficiency at various speeds. V (m/s) FE (kmMit 15 25 6.6 35 7.3 45 7.8 65 8.9 75 9.3 3 8.1 V (mis)