Each county office on aging shall have the power and duty and it shall be the function of said office to:
(a) Maintain a central source of information on programs and services for older people;
(b) Circulate current knowledge related to aging to the public at large and to individuals and groups to which such knowledge would be of benefit;
(c) Stimulate expansion of existing services to more adequately meet the needs of older people and, where desirable, encourage new programs to meet these needs.