4. (12 points) Delta-neutral and Fully-financed Portfolio 3 Assume the Black-Scholes formula is valid exactly and S-40, K=45, r=0.08, T=91/365, cash dividend=0, and o=0.30. a. (3 points) What is delta and what is the call price? b. (3 points) To create a delta-neutral hedge of 100 share (long 100 shares), what investment is required for a delta-hedged portfolio (how many calls are short and what is the borrowing amount)? c. (3 points) What is your overnight profit if the stock tomorrow is $39.00? d. (3 points) What is your overnight profit if the stock tomorrow is $40.50