Can smokers climb Everest?

Could you elaborate on the feasibility of smokers attempting to climb Mount Everest? Are there any specific health risks or physical challenges that they may encounter due to their smoking habit? Additionally, how does smoking affect their overall performance and endurance during the arduous climb to the summit? Lastly, are there any strategies or precautions that smokers should take to mitigate the potential risks associated with smoking while climbing Everest?