A speech signal is sampled at rate of 20000 samples/sec (20kHz).A segment of length 1024 samples is selected and the 1024-point FFT is computed . (i) What is the frequency resolution (Spacing in Hz) between the FFT values? (ii) If the first peak in the spectrum occurs at 15th to sample, what is the pitch frequency? Hence, Find out the period of one glottal cycle