科学完整的工程咨询信息系统应具有( )等功能。

A．数据收集和输入

B．数据鉴别

C．数据输出

D．决策应用

E．统计分析

Mr. B needs to report to the management of L Group.regarding the value analysis (价值分) of Company Y. As the assistant of Mr.B, you have been required by Mr.B to prepare a draft of the analysis. Mr.B has asked you to follow the following steps in drafting the analysis：(1) what does WACC(加权平均资本成本) stand for and what are the factors that would increase or decrease WACC;(2) calculate the equity value (股权价值)of Company Y with the information provided in Table 6-1;showing the step-by-step calculation process;(3) compare the calculated equity value and the stock price (value is over-or under-estimated (股价) to conclude whether the calculated equity assuming that the stock price represents a fair value);(4) what are the reasons that may cause the over-or under-estimation in equity value.