1) The chapter discusses sources of investment returns including income returns from cash flows and returns from changes in the value of investments. 2) It describes how to measure returns such as dollar returns, holding period returns, and annualized returns which allow comparisons over different time periods. 3) Risk is defined as the uncertainty of investment returns and can be measured by the variability of returns using metrics like variance and standard deviation. The higher the risk, the higher the expected return required by investors.