Suppose that the market can be described by the following three sources of systematic risk with associated risk premiums. The return on a particular stock is generated according to the following equation: r=15%+1.5/+0.9R+1.20C+e a-1. Find the equilibrium rate of return on this stock using the APT. The T-bill rate is 5%. (Do not round intermediate calculations. Round your answer to 1 decimal place.) a-2. Is the stock over- or underpriced? Underpriced Overpriced