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. 2019 2020 2021 (Estimated) Required: Tax Payable Case One Case Two Case Three $18,880 $14,480 20,320 19,720 $19,280 14,880 $15,280 16,160 21,760 18,640 18,560 19,440 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