An investor has $5,000 invested in a stock which has an estimated beta of 1.2, and another $15,000 invested in the stock of the company for which she works. The risk-free rate is 6 percent and the market risk premium is also 6 percent. The investor calculates that the required rate of return on her total ($20,000) portfolio is 15 percent. What is the beta of the company for which she works?

a. 1.6

b. 1.7

c. 1.8

d. 1.9

e. 2.0