WHEN JAKE SOLOMON put together his teardown of MyBenefits CalWIN, the food-assistance application form with 212 questions, he didn’t stop there. He and two other graduating Code for America fellows, Dave Guarino and Alan Williams, wanted to get to the bottom of the question: Why was California, a mostly blue, pro-welfare state, tied with Wyoming for the worst food stamps participation rate in the country? About 43 percent of the people eligible for the Supplemental Nutrition Assistance Program in California weren’t enrolled.