A firm has a three divisions, Division 1, Division 2, and Division 3. Divisions 1 and 2 represent 21% and 24% of the firm's value, respectively. The firm's WACC is 8.6%, Division 1's WACC is 9%, and Division 2's WACC is 5.6%. Neither the divisions, nor the firm as a whole have any debt or preferred stock (i.e.: their capital structures are pure equity). If the risk free rate is 3.5%, and the Market Risk Premium is 6.1%, what is the WACC of Division 3?