QUESTION: Fix punctuation: Diameter of pin 45
ANS: Diameter of pin 4,5

QUESTION: Fix punctuation: A table lamp a wall lamp a pendant
ANS: A table lamp, a wall lamp, a pendant.

QUESTION: Fix punctuation: Over the past 50 years widening EU membership has promoted economic growth and strengthened democratic forces in countries emerging from dictatorship
ANS: Over the past 50 years, widening EU membership has promoted economic growth and strengthened democratic forces in countries emerging from dictatorship.

QUESTION: Fix punctuation: When elected presidents displeased the Montealegres they arranged military coups to remove those presidents
ANS:
When elected presidents displeased the Montealegres they arranged military coups to remove those presidents.