问题如下图：
选项：
A. 
B. 
C. 
解释：
investment 3的utility 算错了，应该是0.1900
NO.PZ2018070201000057问题如下KBergeron is a risk-averse investor. He will apply utility theory to choose the investment portfolio. The table shows the expectereturn anexpectestanrviation of severinvestments, assuming the measure of risk aversion is 3, U=E(r)-1/2Aσ2, he is most likely to invest:A.2B.3C.4A is correct.Investment 2 provis the highest utility value (0.1979) for KBergeron who ha measure of risk aversion equto 3.即不同类型的投资者都是选最大的U？
3 4 A is correct. Investment 2 provis the highest utility value (0.1979) for KBergeron who ha measure of risk aversion equto 3. 这人是风险厌恶型 所以应该选效用最小的呀。所以是4。之前有一题选风险喜好型才选效用最大的
请老师解答一下他们都是怎么算的
