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Normal breathing of person 
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The Brainliest Answer!
Take the 3 persons and take a small strip of paper.Now hold it in front of his nose and tell him to breathe normally....2 times the person inhales and exhales=1 breath Count the no of breaths..Now do the same for all three and then see whose is how much...Accordingly make a graph with x axis the name of persons and y axis no of breaths...Now do the same before the sleep and after playing or excercising...Put them all in a comparative graph( comparative, that means, three records in the same graph, eg- Sonu has 25 breaths, 20 and 24 so make a bar graph with sonu and put all three together and do the same for other two)
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