Happy Valley Yogurt distributes its products nationally and has about 25 percent of the market. It makes a variety of flavors, and about 80 percent of its sales come from individual packages of eight ounces. The company has done the stan-dard marketing, advertising, and public relations activities, but your public relations staff believe sales could increase with the use of social networking sites such as Facebook,  Twitter, YouTube, Instagram, and Pinterest. Prepare a proposal to management showing how Happy Valley can tap social media for fun and profit. You need to consider the special characteristics of these sites and what kind of content would be appropriate.