QUESTION: Fix punctuation: Now you could ask why the lowrate of interest offered by Fedral Reserve does not work or why it work in the wrong way
ANS: Now you could ask why the low-rate of interest offered by Fedral Reserve does not work or why it work in the wrong way.

QUESTION: Fix punctuation: Many famous writers artists scientists philosophers and eminent men were vegetarians
ANS: Many famous writers, artists, scientists, philosophers and eminent men were vegetarians.

QUESTION: Fix punctuation: Both Economy and Business Class seats on our Airbus A340300 aircraft used our flights to Chongqing are equipped with a personal entertainment system and video screen Additionally every seat has a power socket that allows you to charge your laptop tablet or mobile phone
ANS: Both Economy and Business Class seats on our Airbus A340300 aircraft used our flights to Chongqing are equipped with a personal entertainment system and video screen. Additionally, every seat has a power socket that allows you to charge your laptop, tablet or mobile phone.

QUESTION: Fix punctuation: Just as with the color of your walls the color of your flooring also plays a significant role in the appearance of space
ANS:
Just as with the color of your walls, the color of your flooring also plays a significant role in the appearance of space.