1) from the topic ∠CAB=∠2+∠CAD.

And < EDF = < 1+< CAD.

Similarly ∠ 1=∠2

So ∠ EDF = ∠ cab = 52.

2) From the topic ∠ABC=∠3+∠ABE

And < AEF = < 2+< Abe.

∠2=∠3

So ∠ABC=∠AEF