Squeeze-it juicer company will buy back their commercial juicers within 6 years of purchase for a specified amount. jami's juice shop purchased one of the company's premium models. however, after a downturn in the economy, the juice shop decided to trade in their premium model for a standard model. based on the buy back value of the premium model, the cost of the standard model is given by the function where is the number of years that have elapsed since the premium model was purchased. over which of the following intervals will the juice shop be able to get the standard model and a refund by taking advantage of the buy back policy?