Are China, North Africa, Brazil and Viet Nam in the same class? find the solution

China is the third economy in the world, and Brazil ranks 1th. Vietnam has made rapid progress after the reform, but it can't compare with the former two countries. China and Brazil are BRIC countries, and North Africa includes Egypt, Libya, Tunisia, Algeria and Morocco. Except Libya, Egypt is ok in Africa, but it can't compare with China and Brazil.