What two signs did god tell moses to perform to prove to people that he was sent from god?

Exodus Chapter 4 verses 1 through 7: AND Moses answered and said, But behold, they will not believe me, nor hearken unto my voice: for they will say, The LORD has not appeared unto you. 2 And the LORD said unto him, What is that in your hand? And he said, A rod. 3 And He said, Cast it on the ground. And he cast it on the ground, and it became a serpent; and Moses fled from before it. 4 And the LORD said unto Moses, Put forth your hand, and take it by the tail. And he put forth his hand, and caught, and it became a rod in his hand: 5 That they may believe that the LORD God of their fathers, the God of Abraham, the God of Issac, and the God of Jacob, has appeared unto you. 6 And the LORD said furthermore unto him, Put now your hand into your bosom. And he put his hand into his bosom: and when he took it out, behold, his hand was leprous as snow. 7 And he said, Put your hand into your bosom again. And he put his hand into is bosom again; and plucked it out of his bosom, and, behold, it was turned again as his other flesh.