=C-H stretch: Around 3300 cm-1
C-C triple-bonded stretch: Around 2150 cm-1
The triple-bonded stretch acts like the double-bonded stretch. It is lowered by conjugation and does not have a peak if the bond is symmetric
The triple-bonded C-C-H bend is in the spectra but not mentioned in the textbook. I assume it acts the same as a double-bonded C-C-H bend.
Below is the spectrum of 4-octyne. You should be able to tell why three peaks are missing compared to 1-octyne:
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