Actually the key is e flat; the accidentals do not add up to the key signature as already discussed in this question; if adding up was intended, a double flat would be required. Repetition of an accidental is also not changing something.

Courtesy accidentals (convention is to put them in parentheses) are quite untypical to appear for accidentals from the key signature, so only the the c flat is really justified.

Actually the key is e flat; the accidentals do not add up to the key signature as already discussed in this question; if adding up was intended, a double flat would be required. Repetition of an accidental is also not changing something.

Courtesy accidentals (convention is to put them in parentheses) are quite untypical to appear for accidentals from the key signature (but since the a flat was natutalized in the bar before, it is a valid courtesy accidental); additionally the c flat is necessary.