If he felt like it/comma question

1) Every day, when he came in from work, he said 'hello' to grandma and patted the dog if he felt like it.

2) Every day, when he came in from work, he said 'hello' to grandma and patted the dog, if he felt like it.

3) Every day, when he came in from work, he said 'hello' to grandma, and patted the dog if he felt like it.

4) Every day, when he came in from work, he said 'hello' to grandma, and patted the dog, if he felt like it.

In which case 'if he felt like it' only applies to 'patted the dog'?

In which case it could apply only the 'patted the dog'?

Gratefully,

Navi.