II, V, I variations in Bach's Prelude BWV 846, second variation

A second variation follows on measures 9 to 11:

Chris Breemer, piano. Recording courtesy of Chris Breemer and Piano Society

The vi degree chord in measure 5:

Is now used in root position and with minor seventh:

The secondary dominant chord in measure 6:

Appears in root position:

The dominant chord in measure 7:

Is also used in root position:

Bach skips the final tonic chord and starts the next variation in an unexpected way...

II, V, I variations in Bach's Prelude BWV 846