Show me the whole work, please.

ncumbent, BB, providing broadband internet service in this market. Your technology is similar to that of BB: both the service characteristics and the cost structure are identical. In particular, both firms incur a fixed cost of 2500 for running the network and a variable cost of 40 per customer. You have to decide whether to enter and, if so, what price to set for your service. BB will then set its own price in response to yours. Please find your optimal decisions under the following 3 scenarios, which all have the exact same structure and differ only in the size of the market. (Try out different prices to find the best one. To speed the process, it suffices to consider multiples of 5.)