Required information [The following information applies to the questions displayed below.) Roland had a taxable estate of $16.4 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 $ 2,081,800 Ret