Construct an Iron Butterfly strategy

 Construct an Iron Butterfly strategy using a table and draw the profit-loss diagram. An Iron Butterfly requires that one buy an OTM put with X1 , sell another ATM put with X2 , sell an ATM call with X2 , and buy an OTM call with X3 . X1 , X2 , and X3 are evenly spaced. Explain what are the similarities and differences between a Butterfly and an Iron Butterfly.