QUES: People create or acquire the most extreme and extravagant fashion

correct the punctuation.

CORRECTED: People create or acquire the most extreme and extravagant fashion.

QUES: Here is the stadium of FC Barcelona Camp Nou its Museum and one of the best shopping areas of the city

correct the punctuation.

CORRECTED: Here is the stadium of FC Barcelona Camp Nou, its Museum and one of the best shopping areas of the city.

QUES: If you download and open the fictitious attachment you might execute Locker Virus without even realizing that

correct the punctuation.

CORRECTED:
If you download and open the fictitious attachment, you might execute Locker Virus without even realizing that.