AP 2-1 Individual Tax Instalments The following table contains information for Gladys Nite for the three years ending December 31, 2019, 2020, and 2021. The tax payable column is her combined federal and provincial tax payable. The amounts in the columns titled Case One, Two, and Three are the amounts withheld by her employer in three independent cases. Tax Payable $18,880 Case One Case Two Case Three $14,480 $19,280 $15,280 20,320 21,760 19,720 14,880 16,160 18,640 18,560 19,440 2019 2020 2021 (Estimated) Required: A. For each of the three cases: Indicate whether instalments are required for the 2021 taxation year. Show all of the calculations required to make this decision. In those cases where instalments are required, indicate the amount of the instalments that would be required under the approach used in the CRA's instalment reminder. In those cases where you have calculated the instalments required under the CRA's instalment reminder approach, indicate whether there is a better approach and, if so, calculate the required instalments under that approach. B. For those cases where instalments are required, indicate the dates on which the payments will be due.