Except as otherwise provided by law, a will must be:
(1) in writing;
(2) signed by:
(A) the testator in person; or
(B) another person on behalf of the testator:
(i) in the testator's presence; and
(ii) under the testator's direction; and
(3) attested by two or more credible witnesses who are at least 14 years of age and who subscribe their names to the will in their own handwriting in the testator's presence.