Counting finite math

Question

Radio stations that are on the west side of a nation have call letters consisting of a K followed by two letters (K can be used again). How many different call letters of this type are possible?

There are how many different call letters that can be formed?

Answer 1

We know there are 3 characters:

the first has to be a K therefore theres only 1 possibility for that letter. The next 2 can be any letter meaning 26 different possibilities for each (assuming they must be the same case). Based on the fundamental counting principle since we have to have a K and L₁ and L₂ we must multiple therefore it is

1 * 26 * 26 = 26² = 676 different call letters. If we don't assume they have to be the same case then its 2 (k or K) * 52 * 52 = 2 * 52^2 = 5408 different possibilities