question: free! one child from 2 to 6 years stays free of charge in an extra bed.
Capitalize this past sentence correctly.
A: Free! One child from 2 to 6 years stays free of charge in an extra bed.

question: it will also be possible to create image galleries, and stream audio or video content, and stuff from your dropbox account.
Capitalize this past sentence correctly.
A: It will also be possible to create image galleries, and stream audio or video content, and stuff from your Dropbox account.

question: this hlp file carries a popularity rating of 1 stars and a security rating of "unknown".
Capitalize this past sentence correctly.
A: This HLP file carries a popularity rating of 1 stars and a security rating of "UNKNOWN".