The duties and powers of a personal representative commence upon appointment. The powers of a personal representative relate back in time to give acts by the person appointed which are beneficial to the estate occurring prior to the person’s appointment the same effect as those occurring thereafter. Prior to the person’s appointment, a person named executor in a will may carry out written instructions of the decedent relating to the decedent’s body, funeral, and burial arrangements. A personal representative may ratify and accept acts on behalf of the estate done by others where the acts would have been proper for a personal representative.