Call option on a stock currently trading at $35 a share are available with strike prices of $30, $35, and $40 and expiration dates in three months. Their prices are $8, $4, and $1, respectively. Construct a long butterfly spread and table showing how profit (loss) varies with change in stock price for this strategy. Possible stock prices at expiration are 30, 35, 40, 45, and 70.