create a y1 function that models the increasing value of the loan. Show it as we would show a calculator window and window settings, in our class. Use an xmin value of 0 to indicate the year 2024 and a xmax value of 5 to indicate 2029. Use an appropriate ymin and ymax. Explain the significance of "a" and "b" in your function. Which is related to loan interest rate, and how would you determine the interest rate in % from the function? Which is related to the amount the borrower owed at the start of the loan? What does x stand for and in which units