The impulse response and input signal are given by h(t) = e−atu(t) and x(t) = t(u(t−t1) − u(t−t2)). Obtain the output y(t) = x(t)∗h(t) by using the following methods. (a) Time domain convolution integration (b) Fourier transformation (c) By using y(m+n)(t) = x(m)(t)∗h(n)(t).