If a child is not breathing, the first nursing action should be?

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E6 Ghai Essential Pediatrics(pp 26-904 of 913) p. 763-765
E6 Nelson Textbook of Pediatrics(2024) — Volume 1 p. 599-601
Practise the full RUHS, Jaipur, PB B.Sc Nursing Entrance-2021
Attempt every question from this paper in a timed mock, then review the full solution for each one.