Open this photo in gallery:An attendee holds American flag placards during the first day of the Republican national midterm convention in Dallas on Sept. 9.KENT NISHIMURA/AFP/Getty ImagesSave for laterWelcome to The Globe and Mail’s business and investing news quiz. Join us each week to test your knowledge of the stories making headlines. Our business reporters come up with the questions, and you can show us what you know. This week: U.S. President Donald Trump this week promised voters he would reward them with US$5,000 apiece if Republicans maintain control of Congress, Apple introduced a major new product and the Royal…