The God of Israel states, as in the 10 Commandments in Exodus 20:2-3:

"I am יהוה (the LORD) your God...you shall have no other god besides me".

How many persons are in the pronoun "I"?

How many persons are in the pronoun "me"?

Why would a tri-personal god be referred to with a singular personal pronoun if they are more than one person?

Which person brought Israel out of Egypt?

Did Jesus teach that יהוה is more than one person?