Which of the following is an allowable deduction for federal estate tax purposes? 1. The $250.000 outstanding mortgage on Queenie's house which is included in her gross estate. 2. A $50,000 bequest to Queenie's alma mater, Fairfield University. 3. The \$10,000 payment of medical expenses incurred by Queenie before her death, but not deducted on the estate income tax return. 4. All of the above. 1 2 3 4