3. Below is a spectrogram that contains 4 quasi-periodic regions that are the vowels /i, I, a, u/ (not necessarily in that order). Circle F1 and F2 for each. Try to identify which is which and draw a line from the label for the vowel to the vowel in the spectrogram. 5000 4000 300 0- 200 0- 100 0 02 04 0.6 0.8 12 Time ($) I_