假定两个投资项目有相同的三个支付，但是每个支付相对应的概率各不相同，如下表所示:(1)求每个投

假定两个投资项目有相同的三个支付，但是每个支付相对应的概率各不相同，如下表所示:（1)求每个投

假定两个投资项目有相同的三个支付，但是每个支付相对应的概率各不相同，如下表所示:

(1)求每个投资项目的期望报酬和标准差。

(2)吉尔的效用函数为U=5I,式中，I为支付。她会选择哪个投资项目？

(3)肯恩的效用函数为U=,他会选择哪个投资项目？

(4)劳拉的效用函数为U=5I²,她会选择哪个投资项目？

Suppose that two investments have the same three payoffs, but the probability associated with each pay off differs，as illustrated in the table below:

a. Find the expected return and standard deviation of each investment.

b. Jill has the utility function U=5I, where I denotes the payoff. Which investment will she choose？

c. Ken has the utility function U=, Which investment will he choose？

d. Laura has utility function U=5I²，Which investment will he choose？