For each signal, find the Fourier transform, X(w), and then plot |X(w)| 4. x(t) = cos(200t)p4(t) 5. x(t)=e³cos(10t)u(t) Note: 1) In the following problem set a notation Pa(t) is used to denote an even pulse (i.e. rectangular) shape function with the duration of a. This means that for example the function x(t) in question number one is 2P2(t-1). 2) It is clear that using the properties of Fourier transform is greatly helpful for finding the answers.