please help don't have much time!! just need answer will upvote

CMR has no debt. The stock's beta is 1.5 and its expected profitability, RE, is 15%. The company decides to go into debt at the risk-free rate, Rf, of 5% to buy back 50% of its shares. Capital markets are supposed to be perfect.

calculate the beta of CMR shares after the repurchase transaction.

a)1.5

b)2

c)3