The intestate share of a decedent’s surviving spouse or surviving domestic partner is:
(1) The entire intestate estate, if no descendant or parent of the decedent survives the decedent;
(2) Two-thirds of any balance of the intestate estate, if the decedent’s surviving descendants are also descendants of the surviving spouse or surviving domestic partner and there is no other descendant of the surviving spouse or surviving domestic partner who survives the decedent;
(3) Three-fourths of any balance of the intestate estate, if no descendant of the decedent survives the decedent, but a parent of the decedent survives the decedent;
(4) One-half of any balance of the intestate estate, if all of the decedent’s surviving descendants are also descendants of the surviving spouse or surviving domestic partner and the surviving spouse or surviving domestic partner has one or more surviving descendants who are not descendants of the decedent; or
(5) One-half of any balance of the intestate estate, if one or more of the decedent’s surviving descendants are not descendants of the surviving spouse or surviving domestic partner.