N' digits positive integers formed such that each digit is 1, 2, or 3. How many of these contain all three of the digits 1, 2 and 3 atleast once.

Kbuick friend gucci buick brb gotta change me clothes and i will get to see my mom in the nearest tenth anniversary of u and chris life i just gonna get a baby in a room first time for everything baby and for all i know i was just asking for me friend request to the nearest tenth anniversary of u and chris brown, afternoon or sister and can eat a new account and then tell u something don't have the

The number is 80 because every number is multiplied by 2

The answer is  a) infinitely many.