Pursuant to an oral agreement, Andy and Jeff formed a partnership to do kitchen remodeling. It was agreed that Andy was to invest $10,000 and manage the business affairs. Jeff, who would invest $1,000, was to work as job superintendent and manage the work. Profits were to be split 50/50, but possible losses were not discussed. The business proved unprofitable, and Andy brought action against Jeff for one-half of the losses. To what extent is Jeff liable? Explain?