4. Fourier series: A periodic signal x(t) with a period T0 = 10 is described over one period, 0 t 10, by the equation 0 )-10 y(t) This signal can also be represented by a Fourier series, y(t)- bkejkaot Explain how bo and b1 are related to ao and a1-(Note: You should not have to evaluate any new integrals explicitly to answer this question.)