QUES: Using this compression technique the user can save and send these files through emails

correct the punctuation.

CORRECTED: Using this compression technique, the user can save and send these files through emails.

QUES: Tightstrong back Lowset long tail

correct the punctuation.

CORRECTED: Tight/strong back. Low-set long tail.

QUES: YES You should tell the air carrier at least 48 hours prior to your departure to ensure that appropriate assistance is available for you

correct the punctuation.

CORRECTED:
YES - You should tell the air carrier at least 48 hours prior to your departure to ensure that appropriate assistance is available for you.