I'm having a problem finding an example of comma placement when two independent clauses are joined by a dependent clause and the word "and". Does the comma go before or after the "and"?
Mary asked John for the third time and, without blinking at eye, he finally turned down the stereo. (I've placed the comma after the "and")
Here's another example:
John ignored Mary throughout the entire meal, and letting out a heavy sigh, she stood up and left the room. (I placed the comma before the "and")
Which is correct?