question: a child of the digital age enters x-rummet
Capitalize this past sentence correctly.
A: A child of the digital age enters x-rummet

question: if you intend to install debian from the downloaded live image, be sure to have a look at the detailed information about the installation process.
Capitalize this past sentence correctly.
A: If you intend to install Debian from the downloaded live image, be sure to have a look at the detailed information about the installation process.

question: hopefully the band will grow before next (and last) brunch next sunday.
Capitalize this past sentence correctly.
A: Hopefully the band will grow before next (and last) brunch next Sunday.