When working with the CAPM, which of the following factors can be determined with the most precision? a. The beta coefficient of "the market," which is the same as the beta of an average stock. b. The...

When working with the CAPM, which of the following factors can be determined with the most precision?

a. The beta coefficient of "the market," which is the same as the beta of an average stock.

b. The beta coefficient, b_i, of a relatively safe stock.