Any issue with i-485 filing?

#1
A few years ago during F1, I extended my CPT without approval. It was for about 3-4months. Since then, I have been on H1B and re-entered the country multiple times. My I-140 is approved. Questions:
1. Will there be a problem when filing I-485?
2. Will I be protected by 245k?
3. The unauthorized work is not mentioned anywhere in my H1B (DS-160) or I-140 applications. Is that an issue?
 
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