a) In a few sentences: (1) describe the key similarities between physical capital and human capital; (2) explain the importance of human capital; and (3) give at least two examples of sources of human capital. b) 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 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? Do not use the formula for approximating the present value. You will need to use a calculator for this problem but please show all your work (lcalculations)