Text: in the case that your usr file doesn't open, it is highly likely that you do not have the correct software application installed on your pc to view or edit usr file extensions.

Correct capitalization: In the case that your USR file doesn't open, it is highly likely that you do not have the correct software application installed on your PC to view or edit USR file extensions.

Text: 109. the production and distribution of electricity

Correct capitalization: 109. The production and distribution of electricity

Text: the following packages were removed due to circumstances beyond our control:

Correct capitalization: The following packages were removed due to circumstances beyond our control:

Text: 5. technique vaulter in the pair.

Correct capitalization:
5. Technique vaulter in the pair.