18. Companies that advertise "rent-to-own" arrangements are sometimes criticized by consumer advocates for the high interest costs built into their rent-to-own contracts. What are the annual percentage rate (APR) and the effective annual rate (EAR) of interest paid by the renter in each of the following arrangements WORK ON EXCEL OR WITH FINANCIAL CALCULATOR Don, a single father, buys a $1,250 washer/dryer combination by paying $300 every six months (starting today) for three years. Don will make a tota of six payments, with the first payment being made later today 18a. The APR is: 18b. The EAR is