A private equity fund was reported to have an IRR of 15% over its 8 year life span. You know that they makde an acquisition when the fund started from which they received a dividend 6 months later. In the IRR calculation, what annualized reinvestment return was assumed on that dividend until the end of the 8 year period? The weighted average cost of capital of the acquired company of 12% The S&P 500's annualized return for that period of 7% The internal rate of return of 15% The average risk free rate for that time period of 5%