Consider an option strategy where the investor simultaneously buys one call with an exercise price of $100, sells two calls with an exercise price of $110 and buys one call with an exercise price of $120 all with the same expiration date. Calculate the payoff of the strategy when spot price of the underlying is less than $100, between $100 and $110, between $110 and $120, and greater than $120 at expiration. Draw a payoff diagram for this strategy. What is the bet being made with this strategy?