please answer it brainlest

1. What are the circumstances that require cardiopulmonary resuscitation CPR?
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2. What should you do first before attempting to give CPR?
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3. When a trained person is performing CPR, how many compressions and how many breaths are in a cycle?
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4. When performing CPR on a stranger, do you always have to provide rescue breaths?
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5. What is the difference between performing CPR on an adult and on an infant?
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6. What are the circumstances that require choking rescue?
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7. What should you do first before performing choking rescue?
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8. What is the Heimlich maneuver and how is it performed?
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9. What should you do if you determine choking rescue is necessary?
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10. What should you do if you are alone and choking?
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