ABC stock has current price (So): $140/share.

Investors hold a portfolio of assets: * ABC stock 100000 shares * Money of 10 billion USD

Investors own the option to buy ABC shares * Trading quantity is 100,000 shares * Exercise price is $100/share * American-style options, expiring on May 29, January +1

Investors can make term deposits at banks with interest rates: 10%/year, paid at the end of the term

Suppose, the company issuing shares ABC does not pay dividends within the next year.

Investors consider 1 of 3 investment strategies as follows: (1) Sell currently held shares, then deposit all proceeds to the bank along with the existing cash balance, for a term of 1 year and keep the call option until maturity (2) Exercise the buy option now (May 30/N), and continue to hold all existing shares until May 29/Y+1 (3) Deposit all available money to the bank, and continue to hold existing shares and purchase options until May 29/N+1

Set up an expression to calculate the value received by the investor on May 29/N+1 according to St for each strategy. {St is the future price of ABC stock after 1 year, unit: USD/share} Is it possible to identify investment strategies that should not be implemented? Why?