To be valid a will shall be in writing and be executed in accordance with the following rules:
1. It shall be signed at the foot or end thereof by the testator, or by some person in his presence and by his direction.
2. Such signature shall be made or acknowledged by the testator in the presence of each of two or more witnesses, present at the same time, and each witness shall attest by his signature the signature of the testator in the presence of the testator, but no form of attestation shall be necessary nor shall it be necessary for the witnesses to sign in the presence of each other.
3. So far as concerns the position of the signature of the testator or of the person signing for him under rule 1, it is sufficient if the signature is so placed at or after, or following, or under, or beside, or opposite to the end of the will that it is apparent on the face of the will that the testator intended to give effect by the signature to the writing signed as his will.
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