QUES: Q: What was the estimated capacity of solar water heating and cooling in 2007?
A: Although generally underestimated, solar water heating and cooling is by far the most widely deployed solar technology with an estimated capacity of 154 GW as of 2007.
Does the answer answer the question?

ANS: yes

QUES: Q: What are desktop computers and laptops commonly infected with?
A: Smart phones, tablet computers, smart watches, and other mobile devices such as Quantified Self devices like activity trackers have also become targets and many of these have sensors such as cameras, microphones, GPS receivers, compasses, and accelerometers which could be exploited, and may collect personal information, including sensitive health information.
Does the answer answer the question?

ANS: no

QUES: Q: When did the United States Patent and Trademark Office grant Foster's patent?
A: Foster's application was granted on March 27, 1990.
Does the answer answer the question?

ANS: yes

QUES: Q: What is available in few cities?
A: Private FM stations are also available in few cities like Shimla.
Does the answer answer the question?

ANS:
yes