It should be installed by a electrician
P represents heating and Q represent cooling.
this is because when you start from a liquid and turn to a gas the particles move faster making them farther apart, causing a gas. the opposite happens when you go from a liquid to a solid. the partials move closer together causing a solid to form. :)
The two statements which are necessary to make the conclusion in the beginning of the question true include:
b) Ben is in the pool.
d) All the boys in the pool are swimming.
<h3>What is Conclusion?</h3>
This is referred to as the final or concluding part of something or an essay and usually contains the summary.
For it to be true that Ben is swimming then he has to be in the pool and all the boys present must be swimming for us to arrive at such conclusion.
Read more about Conclusion here brainly.com/question/26093731
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