The number in the brackets represents the beat of bar that the cadence is part of :-) I didn't put the alternative bar numberings for section B, also the notes are from the official eduqas source.
What is the cadence in bars 3(2)-4(1)?
Perfect cadence in B minor
What is the cadence in bars 7(2)-8(1)?
Perfect cadence in A major
What is the cadence in bars 9(2)-10(1)
Imperfect cadence in F# minor
What is the cadence in bars 11(2)-12(1)
Perfect cadence in F# minor
What is the cadence in bars 15(2)-16(1)
Perfect cadence in F# minor
What is the cadence in bars 19(2)-20(1) 3(2)-4(1)?
Perfect cadence in E minor
What is the cadence in bars 21(2)-22(1) 5(2)-6(1)?
Imperfect cadence in D major
What is the cadence in bars 23(2)-24(1) 7(2)-8(1)?
Perfect cadence in D major
What is the cadence in bars 27(2)-28(1) 11(2)-12(1)?
Perfect cadence in D major
What is the cadence in bars 29(2)-30(1) 13(2)-14(1)?
Imperfect cadence in D major
What is the cadence in bars 31(2)-32(1) 15(2)-16(1)?
Perfect cadence in B minor
What is the cadence in bars 35(2)-36(1) 19(2)-20(1)?
Imperfect cadence in B minor
What is the cadence in bars 37(2)-38(1) 21(2)-22(1)?
Perfect cadence in B minor
What is the cadence in bars 39(2)-40(1) 23(2)-24(1)?
Perfect cadence in B minor
What key does the piece begin in (section A)?
B minor
What key does the piece modulate to in bar 6(2)?
A major
What key does the piece modulate to in bar 8(2)?
F# minor
What key does section B begin in?
F# minor
What key does the piece modulate to in bar 18(2) 2(2)?
E minor
What key does the piece modulate to in bar 20(2) 4(2)?
D major
What key does the piece modulate to in bar 24(2) 8(2)?
G major
What key does the piece modulate to in bar 26(2) 10(2)?
D major
What key does the piece modulate to in bar 30(2) 14(2)?
B minor
In which bar is there a Neapolitan Sixth? (The only chromatic chord in the piece)
Bar 35 (19)