What are the chords and keys indicated in the image?

Analysis of Chords and Keys:

The image displays musical notation with various chords and their corresponding keys or harmonic functions.

• First Section (Under "1. Постройте..."):
• Below the first set of diagrams, the labels indicate harmonic functions. The first diagram corresponds to V7 (dominant seventh chord).
• The second diagram corresponds to V65 (first inversion of the dominant seventh chord).
• The third diagram corresponds to V43 (second inversion of the dominant seventh chord).
• The fourth diagram corresponds to V2 (third inversion of the dominant seventh chord).
• The fifth diagram corresponds to Um.VII7 (diminished seventh chord in minor).
• Second Section (Below the staff, labeled "a-dur"):
• The first chord is labeled V7 in the key of A major (a-dur).
• The second chord is labeled V65, with a note indicating it might be related to the VII degree in minor (VII).
• The third chord is labeled V43.
• The fourth chord is labeled V2.
• The fifth chord is labeled Um.VII7.
• Third Section (Under "2. Сыграйте..."):
• The chords in this section are presented musically. The labels below them are: V7, V65, V43, V2, and Um.VII7.

The numbers within the diagrams (e.g., M.3, 6.3, 6.2) represent intervals (Major third, minor third, augmented sixth, etc.) used in constructing the chords or indicating inversions.

Summary: The image illustrates the construction and labeling of dominant seventh chords and diminished seventh chords in various inversions, commonly used in harmonic progressions and modulation.