Switzerland and Austria Assignment---Social Studies answer these 3 question please ( 20 Points for the first person who answer and 20 points for the second person who answers so I'm giving 40 points)
Please answer them correctly thank you!

The health care system in is referred to as a singleminus−payer health care system, and is a system in which the government provides national health insurance to all residents.

What is the cause of their extinction

Which of the principles do you feel is more important for our our american society? respond in 3 sentences. (principals: popular sovereignty, republicanism, federalism, separation of powers, checks and balances, limited government, or individual rights)