Pam begins saving $2000 per year at age 25, saves for 10 years, and then stops completely at age 35.
Michael delays saving until he turns 35 and then begins saving $2000 per year for 30 years until age 65.
Karen begins saving $2000 per year at age 25 and saves for 40 years until age 65.
*Assumes a seven percent rate of return and tax-deferred compounding.