Given the different situation below illustrate the number of permutation in three ways:

1.) How many three-letter code words can be formed from the letters of the word LOVE if repetition is not allowed?

2.) How many two-digit numbers can be formed from the numbers 1, 2, 3, 4, 5 if repetition is not allowed?

3.) A person has to choose two-digits from 1, 2, 3, and 4 numbers to make two-digit number. How many different arrangements of the digits are possible if repetition is allowed?​