# Reference List - **DC6:** Within the capabilities of a child - **DC9:** Within the capabilities of an adolescent - **DC12:** Within the capabilities of a standard adult - **DC15:** Within the capabilities of an amateur of this task - **DC18:** Within the capabilities of an adept of this task. - **DC21:** Within the capabilities of a professional of this task - **DC24:** Within the capabilities of an expert in this field - **DC27:** Within the capabilities of a master in this field - **DC30:** Within the capabilities of a grandmaster in this field - **DC36:** An heroic achievement - **DC40:** A legendary achievement