Fit the following data in the table using: a$)$ cubic spline interpolation, b$)$ linear regression, and c$)$ cubic

regression. $($python$)$

a$)$ Plot the data points and all the fitting curves $-$ make sure you provide a legend.

b$)$ Between linear and cubic regression, which one is the better fit? $($use the coefficient of determination $R^2$

to assess that$)$

c$)$ Determine the value of $y$ when $x=7\mathrm{.}2$ using the better regression model and print the value out