Every will to be in writing and duly executed

(1) No will shall be valid unless it is in writing, and executed in manner hereinafter mentioned, that is to say, (a) it shall be signed at the foot or end thereof by the testator, or by some other person in his presence and by his direction; (b) such be made or acknowledged by the testator in the presence of two or more witnesses present at the same time; and (c) such witnesses shall attest and subscribe the will in the presence of the testator. (2) No form of attestation shall be necessary.