This is called profile auxiliary view. A primary auxiliary view that is projected on the side adjacent plane, for example, the right side view which is one the three basic planes. This type of view shows true shape of the object.
D. 3 beats in the measure because there’s two quarter notes (1 bt each) and two eighth notes (1/2 bt each); second measure has a half note (2 bts) and a quarter note (1 bt).
