Ques: This allows the intelligence of Windows to decide the correct software application to open your DDB file
Fix the punctuation.
Ans: This allows the intelligence of Windows to decide the correct software application to open your DDB file.
Ques: and for the duration of night work
Fix the punctuation.
Ans: and for the duration of night work.
Ques: The substance was detected in extracts from 4 products at trace level in 3 and at low concentration in 1 product
Fix the punctuation.

Ans: The substance was detected in extracts from 4 products: at trace level in 3 and at low concentration in 1 product.