According to industry estimates, on 30 June 2013, there were 11.19 million smart phone users in Australia. This was 2% increase from 30 June 2012. Assuming Australian mobile phone users will keep growing at 2% every year in the future, calculate: [4] i) the total number of smart phone users in Australia at the end of 2020. [4] ii) in which calendar year Australian smart phone users will reach 15 million