database_quiestion_determine_2NF_3NF

I solved this example to determine 2NF and 3NF. I would like to check if my answer is correct. Can somebody check the 2NF and 3NF of this example, please?

R( A B C D E F G H I J)

with functional dependencies:

AB -> C
A -> DE
B -> F
F -> GH
D -> IJ

My result:

2NF: 
R1 (AB -> C , A -> E) 
R2 (B -> F , F -> GH)
R3 (D -> I)

3NF:
R1 (AB -> C , A -> E) 
R2 (B -> F) 
R4 (F -> GH)
R3 (D -> I)