Daughter lacked authority to sign a nursing home’s arbitration clause on her mother’s behalf though she held a durable power of attorney from mother. The power of attorney allowed her to make financial and health decisions for mother but specifically did not grant her authority to defend, settle or submit to arbitration claims by or against mother. Though the arbitration clause appeared together with the contract hiring the nursing home and its medical personnel to care for mother (which daughter was authorized to sign), the clause was a separate agreement that did not involve medical issues and so fell outside the scope of the power of attorney. Also, although the arbitration clause stated that the signer entered into the agreement both in her representative and her personal capacity, the daughter could not sign in a representative capacity and so her signature was also ineffective to bind her in her individual capacity.