老师，麻烦讲解下这里的27题

老师，麻烦讲解下这道题？

Versoxy Pharmaceuticals recently hired Meelono Investment Partners to work on a secondary public stock offering. Meelono's brokerage division currently has a "Hold" recommendation on Versoxy's stock. Ed Hall, investment banking head, asks Ward Lear, CFA, the head of the brokerage division, to change the recommendation to "Buy." Lear's most appropriate action is to: A. place Versoxy on a restricted list and give out only factual information about the firm. B. assign a different analyst to analyze Versoxy but not mention his conversation with Hall. C. direct the currently assigned analyst to re-examine Versoxy and consider changing the recommendation to "Buy."

老师对于这里的base法则我不太懂，能详细说明一下吗，pv1051是投资者买债券时候的价格，用第一年举例，收到利息83，付的coupon100？这里我有点不太明白这个interest和coupon，老师能否用生活中的例子解释一下呢，谢谢

老师，根据这道题的现有信息 其实是算不出几何平均数的吧？ 几何平均数就是算收益率的？

老师请问A为什么不对呢？interest rate下降，然后投资I变少，AD就decrease

请问为什么当在oligopoly collusion中，为什么purchases are relatively small and frequent会更容易让公司达成collusion，以及为什么当公司的各个oligopoly 公司market share 相似时不容易达成collusion？

R19 26题 如何判断出Bt是为0的？28 题 麻烦帮我讲一下 为什么加速折旧法会导致早些年的现金流降低？

1. 请问在perfect competition的情况下为什么为何在随着Q的上涨MC超过ATC时会带来正的economic profit？2.monopoly公司的MC curve是什么形状？还是U形还是会是一个像AFC逐渐区间于0的形状？

为什么这个形式也属于线性关系？ lny=kx+b 不理解