1. Create another Form Item and name it "Favorite TV Network"
  2. Set the Type from "text" to "radio"
  3. Add options "ABC", "CBS", "NBC", "FOX", and "PBS" by putting each option in separate Value fields.  To add another Value field, click on + that is next to Value and click on - to delete them.  You can also modify the order of the options by clicking on the blue arrows next the +- signs.
  4. Note that if there is no value then no radio buttons will show up.