7. A project has an initial cost of $18,400 and produces cash inflows of $7,200, $8,900, and $7,500 over three years, respectively. What is the discounted payback period if the required rate of return is 16 percent? . 2.31 years . 2.45 years . 2.55 years D. 2.62 years E. never 8. Last year, T-bills returned 2 percent while your investment in large-company stocks earned an average of 5 percent. Which one of the following terms refers to the difference between these two rates of return? A. risk premium B. geometric return C. arithmetic D. standard deviation E. variance