Yes 3000,
Yes 4000,
Yes 5000,
Yes 3000,
You got this man, don't worry. This is why turrets are so useful because you can set their tracking speed to match your BFC tracking speed. Which is why the PD weapon rule of thumb is gauss cannons in turrets. There's actually lot more into the optimal PD weapon choice and setup as it varies for different tech levels and situations, plus now 2.2 changed PD and missile rules so things are little bit up in the air but you can safely ignore that stuff for now. Put a lot of gauss turrets on your escorts and have the turret tracking speed match the BFC tracking speed and build lots of them, you'll be happy you did!