Briefly explain what you would do to a newly born calf that is unable to breath?

If a newly born calf is unable to breathe, I would first check to see if there are any obstructions in its airway, such as mucus or fluid. If there are, I would gently clear the airway using a suction device or by gently patting the calf on the back to help expel the obstruction.

If the calf is still not breathing, I would perform mouth-to-nose resuscitation by gently blowing into its nostrils while covering its mouth to create a seal. I would continue this until the calf starts breathing on its own or seek veterinary assistance if necessary.

It is important to act quickly and calmly in this situation to ensure the calf's survival.