Intentional foul to end qtr

[wyo96]

This came up due to a Intentional foul with a running clock, but it raised the better question.

B1 Intentional Fouls A1 as time expires in the 1st Qtr. Imagine a 2 hand push in the back on a layup as time expires. (within reaction time for timer, so no time to put back)

Is A1 is awarded 2 free throws as part of 1st qtr or 2nd qtr?

If free throws are part of 1st qtr, How does the 2nd qtr. start?
With arrow or possession from the intentional foul?

If possession from the foul, where is the throw in?

If there is a rule or case on point I have missed it.