29. John is 25 years old and wishes to retire in 30 years. His plan is to invest in a mutual fund earning a 12 percent annual return and have a $1 million retirement fund at age 55. How much must he invest at the end of each year to achieve this goal? a. $5,024.60 b. $7,499.96 e. $33,333.33 d. $4,143.65