Need the second and third problems reworked. Thanks!

67631 TAP Check My Work (1 remaining) To the closest year, how long will it take $200 to double if it is deposited and earns the following rates? Do not round intermediate calculations. Round your answers to Notes: (1) This problem cannot be solved exactly with some financial calculators. For example, if you enter PV nearest whole number -200, pMT0, FV-400, and r 7 in an HP-12C and then press the N key, you will get 11 years. The correct answer is 10.2448 years, which rounds to 10, but the calculator rounds up. However, the variable. Then, without clearing the TVM register, you can "override" the variable that changes by simply entering a new value for it and then pressing the key for the unknown variable to obtain the second answer.] Le