Assume Rf = 4.2 percent and Rm = 8.2 percent and an increase in interest rates changes Rf to 7.02 percent; also assume that the market premium (Rm Rf) changes to 6.7 percent. Compute Kj for the following betas: (Round the final answers to 2 decimal places. Omit $ sign in your response.) Please show all calculations

a. Kj when beta is 0.72 %

b. Kj when beta is 1.42 %

c. Kj when beta is 1.72 %