Как из предложений сделать вопросы: 1) what countries border…?

Как из предложений сделать вопросы: 1) what countries border on Russia in the east, in the west, in the south and in the north; 2) how many nationalities inhabit Russia; 3) if there are any volcanoes in our country; 4) who the most popular Russian writers are; 5) what the most famous Russian theatres are; 6) if people in Russia travel a lot; 7) where people of Russia like to spend their holidays.