Bono is a musician,  He sells his neighbor a gently used lawn mower

Question I - Bono is a musician.  He sells his neighbor a gently used lawn mower at a deeply discounted price.  The neighbor is dissatisfied with the performance of the lawn mower.  Can the neighbor sue Bono under the UCC §2-314, the implied warranty of merchantability?  Why or why not?

Question II - If cigarette companies want to work with one another for a common interest, what is one example that would allow the cigarette companies to do so without violating the Sherman Act?  What source of law protects the cigarette companies’ actions?