1. CH1- 1(a. c.) 12(b. d. e.)
2, CH2 - 2(a.c.) 6
3. CH3 - 4(a. b. c.)
4. CH4 - 5, 7(a. b. c. d)
5. CH5 - 3(a. b.) 11(a. b. c. d.)
6. CH6 - 7(a. b. c. d.)
7. CH7 - 8(a. b. c. d.)
a. If Janice decide one courses to take next semester, she'll can't take another courses. Also she can't do another things in taking courses, and she'll taking times to study courses. But if she take courses next semester, she can study something. As a result, she faced trade-offs.
c. Harold and Kumar will face many possibilities. Because the time is scarce, they can't do many things in the same time. So they'll choice one thing giving a lot of satisfaction, in conclusion they'll faced trade-offs.
If cost of computer chips, it affected the market for computers to more activity. According to law of demand, because, the quantity of goods goes up when the price of goods falls. So, demand of computer will increase. And because computer software is complements of computer, when price of computer falls, computer software's demand will goes up. In other case, the typewriter is substitutes of computer, when price of computer falls, typewriter's demand will goes down.