Bangura, Incorporated has accumulated minimum tax credits of $1.43 million from tax years prior to 2018. The following are Bangura's regular tax before credits for 2018 through 2021. 2018 2019 2020 2021 Regular tax before credits $ 165,000 $ 185,000 $ 155,000 $ 31,000 Required: a. Complete the following table to calculate Bangura's allowable minimum tax credit each year under the TCJA rules prior to enactment of the CARES Act. b. Complete the following table to calculate Bangura's allowable minimum tax credit each year under the CARES Act rules, assuming Callen does not adopt the quickie 2018 refund option. Required A Required B Complete the following table to calculate Bangura's allowable minimum tax credit each year under the TCJA rules prior to enactment of the CARES Act. Note: Negative amounts should be indicated by a minus sign. Enter your answers in whole dollars not in millions. Nonrefundable portion of minimum tax credit Refundable portion of minimum tax credit Total minimum tax credit used 2018 2019 Required A Required B > 2020 2021 Required A Required B Complete the following table to calculate Bangura's allowable minimum tax credit each year under the CARES Act rules, assuming Callen does not adopt the quickie 2018 refund option. Note: Negative amounts should be indicated by a minus sign. Enter your answers in whole dollars not in millions. Nonrefundable portion of minimum tax credit Refundable portion of minimum tax credit Total minimum tax credit used 2018 2019 < Required A Required B 2020 2021