Find the number of 4-digit numbers that can be formed using the digits 1, 2, 3, 4, 5 if no digit is repeated. How many of these will be even?

Explanation

To solve the problem, we will break it down into two parts:

1. Finding the total number of 4-digit numbers that can be formed using the digits 1, 2, 3, 4, and 5 without repetition.
2. Finding how many of these 4-digit numbers are even.

### Part 1: Total 4-digit Numbers

1. **Choosing the First Digit:**
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