A company wants to create IDs with using the five numbers from {1, 2, 3, 4, 5} and the three letters from {a, b, c}. How many IDs can be created if three letters are followed by 5 numbers when

1-the same letters and numbers can be used. (Don't simplify the answer.)

2- each letters and numbers should be used only one time. (Don't simplify the answer.)