Suppose you are considering buying a car and have examined the dealership's newspaper advertisements. The advertisement displayed in the accompanying illustration has captured your attention. Taking into account your ability to make a down payment of $2656.95, the remaining amount to be financed is $12,000. Car Advertisement An enticing offer awaits with an Annual Percentage Rate of 8.5%! Take advantage of 48-month financing options available for all Mustangs currently in stock, with a wide selection of 60 models to choose from. These vehicles are fully prepared for immediate delivery, starting at a remarkably low price of $21,599. The only additional charges are the sales tax, amounting to 4% or $863.96, and 1% for the dealer's freight, totaling $215.99. We will cover the expenses for the tag. title, and license. Your total purchase price will be $22,678.95. a. What will be the monthly installment? b. Upon reaching the 25th installment, you intend to pay off the remaining loan with a one-time lump sum. What will be the value of this lump sum?