It's week seven, and the candidates must design a new lunchboxaimed at six-to-eight-year-olds, along with an app toencourage healthy eating.For one team, a clear vision helpsthem take a bite out of the market. On the other, poordecisions and a lack of vision leads to dreary designs.In theboardroom, there's no such thing as a free lunch as onecandidate is fired.