2. Find the Fourier transform of the following signals (a) -1 (b) (c) xa(t) 1 0 1 xv(t) 2 0 -2 2 t [Hint: can you express x(t) as the convolution of two pulses in the form of xa(t)?] x(t) 1 [Hint: can you express x(t) in terms of x(t) and x(t)?]