can you please solve it with detail explanation

Determine the Fourier series representations for the following signals. You shall not only give the Fourier series coefficients, but also give the Fourier series expression of the signals. (a) Each x[n] or x(t) illustrated in Figure 1 . (b) x(t) periodic with period 2 and x(t)=etfor1t1. (c) x(t) periodic with period 4 and x(t)={sin(t),0,0t2,2