SOLUTION EXTRA 2.3b
Geometries: sp3 C/N+ centers are tetrahedral, sp3 N center is trigonal pyramidal (due to lone pair, but tetrahedral electronic geometry), sp3 O center is bent (due to lone pairs, but tetrahedral electronic geometry), sp2 C center is trigonal planar, sp2 O center has no geometry because it is terminal (but trigonal planar electronic geometry).
NOTE: sp3 N center lone pair is involved in resonance with the C=O double bond – a topic to be explored more in lecture 3 (thus, this N center has some sp2 character and is actually best described as sp2).