PLEASE ANSWER QUESTION 1a & b.

1a) You are to calculate a put option (European) that has 3 months left to expiration. The underlying stock does NOT pay dividends and both the stock price and exercise price happen to be equal at $50. If the risk free rate is currently 10% per annum, and the volatility is assessed at 30% per annum, what is the price of the European put option?

b) For this question you are to figure how your answer to Questions 1a would change if a dividend of $1.50 is expected to be paid in two months?