Consider the following basic $100 million CDO structure. The senior tranche has a par value of $70 million dollars and a coupon rate of LIBOR + 1.0%. The mezzanine tranche has a par value of $20 million and a coupon rate equal to 8.25%. The equity tranche has a par value of $10 million. Fees are equal to 5.2% of the equity tranche's par value. The collateral consists of bonds with a coupon 9.75% that mature in ten years. A ten-year interest rate swap with notional principal of $70 million dollars is available that receives fixed rate of 5.25% and pays the LIBOR. Design a CDO that satisfies the above requirements. What is the potential annual return (in percent) to the equity tranche assuming no defaults?