Expenditure on Mobile Phones. Information technologies, such as mobile phones, are very important nowadays. Smart phones have become an important part of our daily life. The topic of this essay is:The factors that are likely to affect individual's decisions about the choice of mobile phone brands (e.g., iphone, Samsung) and the mobile phone plan (e.g., pre-paid and different kinds of contracts) they use. Therefore, your essay should explore: 1. Evidence on trends in mobile phone use in Australia and another country of your choice. 2. The factors affecting individuals' decisions about the brand of mobile phone they use and their choice of mobile phone plans. 3.The factors you took into account in making decisions about your mobile phone plan. Discuss whether you want to change your mobile phone plan if you have the option to change. Your essay MUST apply relevant concepts from microeconomic theory. Thus, you should use relevant concepts and diagrams to address points 2 & 3 above.