[The following information applies to the questions displayed below. ] Roland had a taxable estate of $15.5 million when he died this year. 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.) Award:33 (mum oif 3.00 points b. Roland's prior taxable gifts consist of a taxable gift of $1 .5 million in 2005