3. The volume and area of a torus is given by: V=\frac{1}{4} \pi^{2}(a+b)(b-a)^{2} \quad ; \quad A=\pi^{2}\left(b^{2}-a^{2}\right) Write a user-defined function that computes V and A from arguments a and

b. (Note: comment out the syntax inyour *.m file) (1pt)