Question 1: An investor buys a call and a put of apple at the same strike ($105) and same maturity (6 months from today). The prices for call and put are $3 and $2.5, respectively, and the current price for apple is $105.

Three month later, investor make money from selling the call and put at the same time. Assume that there is no transaction cost, what are all possible ranges of the price for the apple stock after 3 months?

Question 2: We purchase 10 shares of Amazon for $1960 a share on 50% initial margin. If the maintenance margin is 30%. What is the price for Amazon that will lead to a margin call from the broker? Assuming no interest rate for borrowing.