McDonald’s new Chief Executive Steve Easterbrook is set to unveil his plan on Monday to revive growth as the world’s largest hamburger chain struggles to win back consumers and investors. He’ll be aiming to persuade people such as Janna Sampson, co-chief investment officer at OakBrook Investments, which bought McDonald’s (MCD.N) shares on the cheap more than a decade ago and eventually held more than 7 million shares as the company spiffed up its restaurants, improved service and expanded its menus with things like fancy coffee, salads and wrap sandwiches.