urgent please help me !!!

any alpha(a) value=1

2a x(1) a 0 5 -a Fig. 3 A periodical signal 1) 120 pts. Find the Fourier series representation of the signal shown in Fig. 3. 2) (10 pts. Find the Fourier transform of *(t) = e-[u(+ a)-u(l-a)] Using the integral definition. 3) 110 pts. Find the Fourier transform of X(t) = cos(at)[u(+a) - ut-a)] Using only the Fourier the transform table and properties 2a x(1) a 0 5 -a Fig. 3 A periodical signal 1) 120 pts. Find the Fourier series representation of the signal shown in Fig. 3. 2) (10 pts. Find the Fourier transform of *(t) = e-[u(+ a)-u(l-a)] Using the integral definition. 3) 110 pts. Find the Fourier transform of X(t) = cos(at)[u(+a) - ut-a)] Using only the Fourier the transform table and properties