I cannot figure out why these are wrong. Would appreciate help.

1. What is the present value on January 1, 2019, of $30,000 due on January 1, 2023, and discounted at 10% compounded annually? $ 20,490.40 X 2. What is the present value on January 1, 2019, of $40,000 due on January 1, 2023, and discounted at 11% compounded semiannually? $ 26,063.59 X 3. What is the present value on January 1, 2019, of $50,000 due on January 1, 2023, and discounted at 16% compounded quarterly? $ 26,695.41 x