Can someone please help me with this question I dont understand

We will derive a two-state put option value in this problem. Data: Sp = 170; X = 180; 1 + r= 1.1. The two possibilities for Sy are 210 and 90. a. The range of Sis 120 while that of Pis 90 across the two states. What is the hedge ratio of the put? (Negative value should be indicated by a minus sign. Round your answer to 2 decimal places.) Hedge ratio b. Form a portfolio of 3 shares of stock and 4 puts. What is the (nonrandom) payoff to this portfolio? (Round your answer to 2 decimal places.) Nonrandom payoff c. What is the present value of the portfolio? (Round your answer to 2 decimal places.) Present value d. Given that the stock currently is selling at 170, calculate the put value. (Round your answer to 2 decimal places.) Put value