Hal Thomas, a 35-year-old college graduate, wishes to retire at age 60. To supplement other sources of retirement income, he can deposit $2,300 each year into a tax-deferred individual retirement arrangement (IRA). The IRA will earn a return of 12% over the next 25 years. a. If Hal makes end-of-year $2,300 deposits into the IRA, how much will he have accumulated in 25 years when he turns 60? b. If Hal decides to wait until age 45 to begin making end-of-year $2,300 deposits into the IRA, how much will he have accumulated when he retires 15 years later?