Answer to Question 1ANS:
Rights that are implied by other rightsnamely, rights explicitly delineated by the Constitutionare in the Constitution's penumbra (its shadow). The legal right to privacy is an important example; the Supreme Court's reasoning in Roe v. Wade appeals to it.
Answer to Question 2ANS:
In assisted suicide, a person receives help in ending his own life, but he himself is the agent who acts so as to cause his death. In euthanasia, someone other than the patient causes the patient's death.