How to spot a modulation - Part 1

How to spot a modulation: it's easy!
If you see a raised note, it will most likely be the 7th note of the key it's modulating to, confirmed by a move to the new key's tonic.
If you see a lowered note, it will most likely be the 4th note of the key it's modulating to, confirmed by a move to the new key's tonic.
The music is from Bach's 4th French Keyboard suite in Eb Major