A guardian of the estate shall:
1. Protect, preserve, manage and dispose of the estate of the protected person according to law and for the best interests of the protected person.
2. Apply the estate of the protected person for the proper care, maintenance, education and support of the protected person and any person to whom the protected person owes a legal duty of support, having due regard for other income or property available to support the protected person or any person to whom the protected person owes a legal duty of support.
3. Have such other authority and perform such other duties as are provided by law.