Any person interested as or through an executor, administrator, trustee, guardian or other fiduciary, creditor, devisee, legatee, heir, next of kin or cestui que trust in the administration of a trust or of the estate of a decedent, infant, lunatic or insolvent may have a declaration of rights or legal relations in respect thereto:

1. (1) To ascertain any class of creditors, devisees, legatees, heirs, next of kin or others;
2. (2) To direct the executors, administrators or trustees to do or abstain from doing any particular act in their fiduciary capacity; or
3. (3) To determine any question arising in the administration of the estate or trust, including questions of construction of wills and other writings.