题目是这样的
Suppose that the company that does well has
1)10 times as many shares on issue as the company that does badlly
2)one-tenth of the number of shares on issue as the company that does badly
Calculate the arithmetic, logarithmetric and buy-hold daily returns and cumulative daily return for each security and for a value weighted portfolio in which 10 times as many shares are held in the larger company.

求教这道题要怎么做呀？？