The pay back period of an investment that achieves the following cash flow in a row (0,1000,2000,4000) and its initial outlay equals $5000 is:- Select one: O a. 2 years and 6 months b. 3 years and 5 months O c. 2 years and 5 months O d. 3 years and 6 months Which of the following categories of owners have unlimited liability? Select one: a. general partners in a limited partnership O b. sole proprietors c. shareholders of a corporation O d. both A and B