Kotlin question from a tutorial

Question

Hello to everyone reading,
can you please explain the answer to this question?

How would you modify this main() function so that it prints a 6-layer cake for someone's 4th birthday?

fun main() {
val age = 24
val layers = 5
printCakeCandles(age)
printCakeTop(age)
printCakeBottom(age, layers)
}

Answer Options :

1. Set val age to 6, set val layers to 4

2. Set val age to "4", set val layers to "6"

3. Set val age to 4, set val layers to 6

4. Leave the code as-is

Answer 1

The answer is 3. To be a 4th birthday, age must be 4. To have a 6-layer cake, layers must be 6.