QUES: Fifteen students and four teachers from four different schools have come together in the Municipal Hall of Ungdomsbyen to present the games that they have developed

correct the punctuation.

CORRECTED: Fifteen students and four teachers from four different schools have come together in the Municipal Hall of Ungdomsbyen to present the games that they have developed.

QUES: Initially Havana depended upon rainwater captured in cisterns

correct the punctuation.

CORRECTED: Initially Havana depended upon rainwater captured in cisterns.

QUES: Healthy and happy employees would mean more productivity energy and positivity at the workplace

correct the punctuation.

CORRECTED:
Healthy and happy employees would mean more productivity, energy and positivity at the workplace.