Gordon paid the $10,000 balance of his Federal income tax three months late. Determine the interest rate that applies relative to this amount for the first quarter of 2021. (Ignore daily compounding of interest.) a. Gordon is an individual. Interest Rate (%) % b. Gordon is a calendar year C corporation. % C. The $10,000 is not a tax that is due, but is a refund payable by the IRS to Gordon (an individual). % d. The $10,000 is not a tax that is due, but is a refund payable by the IRS to Gordon (a calendar year C corporation). %