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3. (15 marks) a. The post-secondary enrollment rates of high school graduates in the United States rose most rapidly during the period 1980 to 1985 when the rates for men rose 11.9% and for women rose 5.1%. On the other hand, the Wall Street Journal (August 7, 1988, p. 31), reported an average annual increase in costs of tuition and fees at public four-year post-secondary institutions from $706 to $1,242, a 76% increase. For four-year private colleges and universities, average tuition and fees rose 65% from $3,279 to $5,418. These increases far exceeded the 31% increase in the Consumer Price Index that took place during this time. How is it possible that college enrollment rates could be rising at the same time college costs were rising so substantially in real terms? b. Why is it that university students tend to be generally in the younger age group (18-22 years mostly)? How does human capital theory help answer this question? C. Senior workers tend to be more experienced, have acquired lot of on-the-job training, and can provide leadership roles. However, they do not move from one employer to the other in the industry as rapidly as younger workers. Why is this the case