Hi, I would like to get some help with these multiple choice questions. Please give some intuition

Question 14. A call option's value is decreasing in Stock price. Time to expiration Volatility of the stock. Exercise price Question 15. Recall that buying a put option and a share of stock gives the same payoff as a call option and cash. Write the put-call parity relationship Question 16. From the binomial model and the Black-Scholes we can see that a higher expected return of the stock Does not effect the call price. Increases the call price. Decreases the call price. It depends Question 17. What is it called if the futures price is lower that the expected future spot price? Contango Expectations hypothesis Normal backwardation Delta Question 18. The payoff of a utues contract that is held until mat urity is OST-F Fr-Sr