How would one go about answering this question? I cannot make the payoff at stock price 80 work. I get 20 with a long butterfly.

s. You are interested in creating the following payoff profile using options. What European options would you hold in your portfolio and at what strikes? Assume that the desired payoffs at expiration are zero for any stock price more than 100 or less than 60. Stock Price 60 70 80 90 100 Payoff at 0 10 30 10 0 expiration