Identify the following statements as internal or external influences on consumer behavior.

I $-$ You buy the iPhone $13$ Pro as it was recommended by a friend.

II $-$ You spend more on healthy, organic, protein$-$rich food products as you lead an active lifestyle.

III $-$ You buy a belt from a fashion brand because a celebrity posts about it on Instagram.

IV $-$ When you move to another city, you buy the same toothpaste as your father used to buy when you were a kid.

$1)$ Internal: II and IV; External: I and III

$2)$ Internal: IV; External: I, II$,$ and III

$3)$ Internal: II; External: I, III, and IV

$4)$ Internal: II and III; External: I and IV