i need help with all 3

We will derive a two-state put option value in this problem. Data: S0=$230;X=$240;1+r=110. The two possibilities for Sr are $260 and $180. Required: a. The range of S is $80 while that of P is $60 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.) b. Form a portfolio of three shares of stock and four puts. What is the (nonrandom) payoff to this portfolio? (Round your answer to 2 decimal places.) What is the present value of the portfolio? (Round your answer to 2 decimal places.)