where can i find my hardware id?

How would the previous sentence be correctly capitalized?
Answer: Where can I find my hardware ID?
the helmet is made of abs plastic and are not bulletproof.

How would the previous sentence be correctly capitalized?
Answer: The helmet is made of ABS plastic and are not bulletproof.
families and friends can send greetings to the runners by using the hashtag #cphmarathon on twitter, instagram or facebook. selected posts are displayed on the big screens and in the live video stream.

How would the previous sentence be correctly capitalized?
Answer: Families and friends can send greetings to the runners by using the hashtag #cphmarathon on Twitter, Instagram or Facebook. Selected posts are displayed on the big screens and in the live video stream.
a large, new first-class hotel, popular among european tour operators, located in the heart of the business center.

How would the previous sentence be correctly capitalized?
Answer: A large, new first-class hotel, popular among European tour operators, located in the heart of the business center.