3.3. For the continuous-time periodic signal x(t)=2+\cos \left(\frac{2 \pi}{3} t\right)+4 \sin \left(\frac{5 \pi}{3} t\right) determine the fundamental frequency wo and the Fourier series coefficients a such that x(t)=\sum_{k=-\infty}^{\infty} a_{k} e^{j

k \omega_{0} t}