Find 
using the appropriate Chain Rule for 
where 
, and 
.
Definitions:
Optimal Portfolio
Optimal Portfolio is an investment portfolio that offers the highest expected return for a specific level of risk or the lowest risk for a given level of expected return.
Diversifiable Risk
A type of risk that can be reduced or mitigated through diversification or spreading investments across different assets to reduce exposure to any single risk.
Market Risk
The potential for financial loss due to fluctuations in market conditions, such as changes in stock prices, interest rates, or exchange rates.
Randomly Selected Stocks
Stocks chosen without any specific pattern, criteria, or bias, often used in sampling or experimental portfolios.
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