请看例句：
Rather than confronting her about the issue, John took the easy way out and promptly began to ignore her instead.l
It is an easy way out to blame others for our failure.
I need to find a way out.
上述几个例句中的out分别做什么成分呢？
另外第一个例句中的rather than是用作复合介词了么？
如题