global tech sells modern equipments .to purchase a new equipment for your company from global tech you as a financial manager have narrowed down two equipment models which meet your requirements equally. however the schedule of the payments of two models are differrent model a requires yearly payment of $ 16000 for 5 years with the first payment to be made at the end of year 1. model B requires yearly payment of $ 15500 for 5 years with the first payment to be made today . given yearly interest rate of 6% which model would you purchase and why