9. The Fourier spectrum below, Amplitude 200 400 600 800 1000 1200 Frequency (Hz) a. Is representative of a pure tone. b. Illustrates a harmonic series, where 200 Hz is the fundamental frequency and 600 Hz and 1000 Hz are the 3"d and 5th harmonics, respectively. c. Represents a harmonic series, where the fundamental frequency is 100 Hz and 200, 800, and 1000 are the 2nd, 8th, and 10th harmonics. d. Represents a sound that would cause the basilar membrane to vibrate at a frequency of 200 Hz only