17. (5) You want to have $100,000 in 10 years. How much money must you deposit today at 4% interest compounded monthly to reach that goal? Mathematical Ideas Test 4 Math 105 Spring 2023 18. (8) You want to buy a $21,000 car. You have a $3.000 down payment. You geta month xed installment loan with monthly payments of $448. (a) What is the total nance charge? (b) What is the APR to the nearest half percent? 19. (8) You want to buy a house for $350,000. You can obtain a mortgage requiring a 20% down payment. The current mortgage rate is 6.5%. (a) Determine the amount of the required down payment. (b) Determine the monthly principal and interest payment for a 20year mortgage with a 20% down payment