What attainment level should a year 4 child be achieving ?

[Ladyemem]

Ds is in year 4 (9 in april) and achieving level 3c in numeracy and literacy.

Where was he at the end of KS1?

Average child
End of y2 2b
End of y3 2a/3c
End of y4 3b
End of y5 3a/4c
Enf of y6. 4b

great thanks