Match the following intervals with their names.(2 points)

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The pitches C and B natural are shown next to each other.
Two notes appear on the treble staff in the following order: a B on the third line and an F on the fifth line.
Two F notes appear stacked on the treble staff. One is on the lowest space, and the other is on the highest line.

- Unison

- Fourth
- Octave

The intervals can be matched with their names as follows:

1. C to B natural: Major 7th
2. B to F: Perfect 4th
3. Lowest F to highest F: Octave