Purple Dragon Knights high level feature

Do the temp HP from Heroism accumulate each round

Can a Sorcerer with 2 levels of Warlock get to trade 2 Level 1 slots for 6 Spell Points after every short rest?

If someone wanted to have Tiamat as a Warlock patron which one would she fall under?

Whilwind Attack-Must targets be wt 5′ when taking action or attacking & can move between attacks?

Tough feat, does it mean if you gain 10 hp that level you get 20?

Can a fighter use 2 maneuvers: Riposte on enemy’s attack & Pushing Attack on his attack?

Can a fighter use 2 maneuvers: Riposte on enemy’s attack & Pushing Attack on his attack?

Is a creature surprised if it doesn’t notice one threat but does notice another, separate threat?