please show the work with formula on excel

W4(1) PROBLEM 1 Assume the risk-free rate is 6 percent and the market risk premium is 6 percent. The stock of Cigna (CI) has a beta of 1.5. The last dividend paid by Cigna (DO) was $2 per share. a. What would Cigna's stock value be if the dividend was expected to grow at a constant -5 percent? O percent? 5 percent? 10 percent? b. What would be the stock value if the growth rate is 10 percent, but Cigna's beta falls to 1.0? 0.5