Interest rate (with changing years). Keiko is looking at the following investment choices and wants to know what annual rate of return each choice produces. a.Invest $400.00 and receive $859.27 in 10 years. b.Invest $3800.00 and receive $10,156.24 in 16 years. c.Invest $31,742.91 and receive $120,000.00 in 20 years. d.Invest $34,653.91 and receive $1,100 comma 000.00 in 30 years. a.What annual rate of return will Keiko earn if she invests $400.00 today and receives $859.27 in 10 years? (Round to two decimal places.)