In June 2009, Cisco Systems had a market capitalization of $118 billion. It had A-rated debt of $10 billion as well as cash and short-term investments of $37 billion, and its estimated equity beta at the time was 1.37. Answer the following 2 questions. Label your answer clearly. a. What is Cisco's enterprise value? b. Assuming Cisco's debt has a beta of zero, estimate the beta of Cisco's underlying business enterprise.