two easy practice problems i cant solve. thanks for help in advance

Which of the following is (are) true about trusts? 1. trusts avoid probate 2. trusts can assure that children from a previous marriage will receive an inheritance 3. trusts can care for special needs children 4. trusts are easier to challenge in court 1,2,3,4 1 1,2,3 1,2 Why might you set up a last will and testament? 1. You can avoid estate taxes 2. You can appoint a guardian for your dependent children 3. You can direct health care wishes 4. You can name a person to carry out your directives after your death. 2,3,4 2,4 1,2,3,4