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For the next three questions, suppose that a consumer maximizes the utility function U(x 1 ; x 2 )=ln(x 1 - 5) + ln(x 2

For the next three questions, suppose that a consumer maximizes the utility function U(x1; x2)=ln(x1- 5) + ln(x2) subject to the usual budget constraint P1 x1 + P2 x2 = Y .

1. Find the demand functions for x1 and x2.

2. Is good 1 normal or inferior?

3. Is good 2 normal or inferior?

For the next two questions, consider a consumer with utility function U(x1, x2) = x1+x1x2+x2 who obeys the standard budget constraint P1x1 + P2x2 = Y . Formulating the problem formally, the consumer solves:

max x1 + x1x2 + x2

s.t. P1x1 + P2x2 = Y

4. Solve for optimal x1 and x2.

5. Are goods x1 and x2 substitutes or complements?

For the next five questions, an investor is considering whether to purchase Atlassian stock. The investor's utility function is, where r is the return that the investor earns. The return is uncertain, and the table below shows the distribution of returns.

r probability

0.01 0.2

0.04 0.4

0.09 0.3

0.25 0.1

6. Calculate the expected return. Answer with a two-digit decimal; do not write in % form.

7. Calculate the expected utility.

8. Calculate the certainty equivalent.Answer with the precise decimal number or round to a two-digit decimal; do not write in % form.

9. Calculate the risk premium.Answer with the precise decimal number or round to a two-digit decimal; do not write in % form.

10. What is this investor's attitude towards risk?

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