Notice of the action to appoint a conservator shall be served upon the following persons:
a. The conservatee unless he is the plaintiff;
b. The spouse and adult children of the conservatee or, where there are none, upon the person or persons closest in degree of kinship to the conservatee;
c. The person with whom the conservatee resides, or if the conservatee resides in an institution, upon the chief administrator of that institution.