Determine the first and second derivatives of the following functions, usiMATLAB®'s symbolic functions: f_{1}(x)=y=x^{3}-4 x^{2}+3 x+8 f_{2}(x)=y=\left(x^{2}-2 x+1\right)(x-1) f_{3}(x)=y=\cos (2 x) \sin (x) f_{4}(x)=y=3 x e^{4 x^{2}}