Harold and Maude were married and lived in a common$-$law state. Maude died in $2018$ with a taxable estate of $$25$ million and left it all to Harold. Maude's executor filed a timely estate tax return claiming the marital deduction for the property left to Harold including a valid portability election. Harold died this year, leaving the entire $$25$ million to their three children.$($Refer to Exhibit $25-1$ and Exhibit $25-2.)$

Calculate how much estate tax is due from Harold's estate under the following two alternatives.

Assume that neither Harold nor Maude had made any taxable gifts prior to this year.

Assume that Harold and Maude each made a $$1$ million taxable gift in $2011$ and offset the gift tax at that time with the applicable credit.