Alice invests $8000 in two certificates of deposit; the interest on the first certificate is 2%, and the interest on the second is 3%. Let's denote the amount she invests in the first certificate by x. Then the amount she invests in the second certificate is _________ . The interest she receives on the first certificate is __________ , and the interest she receives on the second certificate is ______________ . So a function that models the total interest she receives from both certificates is y =___________ .