Roman is the chief executive officer of salty snax corporation. roman’s responsibilities include decisions on product development, marketing, and other significant business directions. roman is subject to the approval and oversight of salty snack board of directors. teri is a salty snax manager whose duties include the firm’s day-to-day hiring, firing, purchasing, and selling. umberto is a salty snax salesperson, whose daily activities are controlled by teri. velma writes sales manuals and promotional materials for salty snacks products according to roman’s instructions and subject to salty snacks control, but has no dealings with the company’s customers or suppliers. warren writes copy on a contract-per-project basis and is not otherwise subject to salty snacks control. who is a principal