Yun has just finished high school. He has three periods of time left in his working life, and is considering three career options: Obtain a job in a hotel, earning $20,000 per year for each of the remaining three periods of his working life. . Attend community college, earning a diploma in human resources. The diploma takes one period to complete, with tuition fees equal to $5,000. After graduation, he will earn $50,000 per year for the remaining two periods of his life. . Attend university to obtain his Ph.D. in art history. The degree takes two periods to complete, with tuition fees of $10,000 per period. After 3 graduation, he will earn $90,000 per year for the one remaining period of his working life. Assuming an interest rate of 10% per period, which career path should he follow