This question has been answered incorrectly a few times. Please answer all parts and show work. Thank you

Any answer I attempted below is wrong.

Required Information The following information applies to the questions displayed below.) Roland had a taxable estate of $15.5 million when he died this year. Required: Calculate the amount of estate tax due (if any) under the following alternatives. (Refer to Exhibit 25-1 and Exhibit 25-2.) (Enter your answers in dollars and not in millions of dollars.) a. Roland's prior taxable gifts consist of a taxable gift of $1 million in 2005. Answer is complete but not entirely correct. Estate tax due $ 2,128,000 Required Information [The following information applies to the questions displayed below.) Roland had a taxable estate of $15.5 million when he died this year, Required: Calculate the amount of estate tax due (if any) under the following alternatives. (Refer to Exhibit 25.1 and Exhibit 25:2) (Enter your answers in dollars and not in millions of dollars.) b. Roland's prior taxable gifts consist of a taxable gift of $1.5 million in 2005. Estate tax due $ 2.128,000 Required Information [The following information applies to the questions displayed below) Roland had a taxable estate of $15.5 million when he died this year. Required: Calculate the amount of estate tax due (if any) under the following alternatives. (Refer to Exhibit 25-1 and Exhibit 25-2.) (Enter your answers in dollars and not in millions of dollars.) C. Roland made a $1 million taxable gift in the year prior to his death. Estate tax due $ 1,000,000 of Amount Over EXHIBIT 25-1 Unified Transfer Tax Rates* Tax Base Equal to or Over Not Over Tentative Tax Plus S 0 $10,000 $0 18% 10,000 20,000 1,800 20 20,000 40,000 3,800 22 40,000 60,000 8,200 24 60,000 80,000 13,000 26 80,000 100,000 18,200 28 100,000 150,000 23,800 30 150,000 250,000 38,800 32 250,000 500,000 70,800 34 500,000 750,000 155,800 37 750,000 1,000,000 248,300 39 1,000,000 345,800 40 *The applicable credit and exemption are zero for estates that opted out of the estate tax in 2010. $ 0 10,000 20,000 40,000 60,000 80,000 100,000 150,000 250,000 500,000 750,000 1,000,000 EXHIBIT 25-2 The Exemption Equivalent Gift Tax Estate Tax Year of Transfer 1986 1987-1997 1998 1999 2000-2001 2002-2003 20042005 $500,000 600,000 625,000 650,000 675,000 1,000,000 1,000,000 1,000,000 1,000,000 20062008 2009-2010 2011 5,000,000 $500,000 600,000 625,000 650,000 675,000 1,000,000 1,500,000 2,000,000 3,500,000 5,000,000 5,120,000 5,250,000 5,340,000 5,430,000 5,450,000 5,490,000 11,180,000 11,400,000 11,580,000 11,700,000 2012 2013 5,120,000 5,250,000 5,340,000 2014 2015 5,430,000 5,450,000 2016 2017 2018 2019 5,490,000 11,180,000 11,400,000 11,580,000 11,700,000 2020 2021