the project leader is chosen in an election in which all debian developers are eligible to vote.

How would the previous sentence be correctly capitalized?
Answer: The Project Leader is chosen in an election in which all Debian Developers are eligible to vote.
use my flowers4malaga.com account to access your account and contact customer service.

How would the previous sentence be correctly capitalized?
Answer: Use my flowers4malaga.com account to access your account and contact customer service.
the apartment is on the second floor: very light with balconies, 2 bedrooms, a bathroom with shower, living room with fully equipped kitchenette.

How would the previous sentence be correctly capitalized?
Answer: The apartment is on the second floor: very light with balconies, 2 bedrooms, a bathroom with shower, living room with fully equipped kitchenette.
it is friendship, love and togetherness under one roof until an earth-shattering love affair puts the community and the commune to its greatest test yet.

How would the previous sentence be correctly capitalized?
Answer: It is friendship, love and togetherness under one roof until an earth-shattering love affair puts the community and the commune to its greatest test yet.