It is desired to build a sampling system which takes a recorded orchestral music signal s(t) and converts it to a discretely-sampled form. In order to experimentally determine the bandwidth (in frequency) of this signal the best transform would be (circle the correct answer or answers and then justify your answer(s), for all choices you circled): i) The Fourier transform of a continuous function or a discrete sequence ii) The z-transform iii) The Fourier series iv) The discrete Fourier transform