IRR on investment exit (alternative asset valuation)

CFA CURRICULUM VOL 5, PG 66 EXAMPLE 2 This example tells IRR on company A is 6.1%. How?? I thought it is 12.5% (=5/40). comments?

IRR from calculator PV = -40 (original investment) FV = 45 (profit + original investment) N = 2 PMT = 0 CPT I/Y 6.07% since 6.07 < 8 (hurdle rate) then no carried interest is paid

thanks omar