Suppose you borrow $37222.23M when financing a gym with a cost of $85142.44M. You expect to generate a cash flow of $72817.93M at the end of the year if demand is weak, $98171.82M if demand is as expected and $124050.73M if demand is strong. Each scenario is equally likely. The current risk-free interest rate is 4.71% (risk of debt) and there's a 12.15% risk premium for the risk of the assets. What would be the realized return of equity if the demand is weak?

(HINT: If you need it, to compute the WACC of the firm, add the risk free plus the risk premium)