Please show formulas used. You're planning to save for his retirement 34 years from now. You plan to invest $4,200 per year for the first 7 years, $6,900 per year for the next 11 years, and $14,500 per year for the following 16 years. You make all investments at the end of each year. The investments will earn an annual rate of return of 9.7%. What will your investment be worth 34 years from now?