## CAPM, finding if a stock is over or under priced

a corp. is trying to estimate if it's stock is overpriced, under-priced or fairly priced, the analyst assigned looked up the s&p index and it's 12%, and the t-bill rate is 3%. three other specialty auto dealers' betas are 1.2, 1.6, and .9 . the corps dividends are growing at an annual rate of 3% and the last dividend paid was $2.50 current market price of the corps stock is$26.14

is there even enough information to know whether the stock is over or underpriced, and how can i tell if it is?