(A) The testator or settlor has the burden of establishing prima facie proof of the execution of the will or trust, as applicable. A person who opposes the complaint has the burden of establishing one or more of the following:

1. (1) The lack of testamentary intent or the intent to create a trust, as the case may be;
2. (2) The lack of the testator's testamentary capacity, or the settlor's legal capacity to enter into and establish the trust;
3. (3) Undue influence, restraint, or duress on the testator or settlor;
4. (4) Fraud or mistake in the execution of the will or trust;
5. (5) Revocation of the will or trust.