1. What is the lower bound for the price of a 3-month European call option on a non-dividend paying stock when the stock price is $100, the strike price is $90, and the risk-free interest rate is 5% per annum? 2. What is the lower bound on the price of a 3-month European call option on a non-dividend paying stock when the stock price is $100, the strike price is $110, and the risk-free interest rate is 5% per annum? 3. Assume that the price of a 3-month European call option on a non- dividend paying stock with stock price $100 and strike price $90 is $11.67. The risk-free interest rate is 5% per annum. What is the price of the European put option on the same stock with the same strike and maturity?