Oak Corporation holds the following general business credit carryovers: 2016 $5,000 2017 15,000 2018 6,000 2019 19,000 Total carryovers $45,000 The Oaks general business credit generated by 2020 activities equals $36,000 and the total credit allowed during the current year is $60,000 (based on tax liability). a. Enter the amount (if any) of each year's carryover utilized in 2020. Year Amount of Carryover Utilized 2016 $fill in the blank 1 2017 $fill in the blank 2 2018 $fill in the blank 3 2019 $fill in the blank 4 2020 $fill in the blank 5 b. What is the amount of any unused credits carried forward to 2021? $fill in the blank 6 .