1. A stock's contribution to the market risk of a well-diversified portfolio is called ________________ risk. (systematic or unsystematic) 2. Beta coefficients are generally calculated using historical data. (True or False) 3. Higher-beta stocks are expected to have higher required rates of returns. (True or False) 4. Stock A's beta is 1.0; this means that the stock has a negative correlation with the market. (True or False)