Rapala X-Rap Magnum 30 Fishing Lure (Silver Blue Mackerel, Size- 6.25)

What size treble hooks for xrap 30

How many come in this order?

Is this the X-rap Magnum *30*? or the 20/10/etc? (ans = it's the 30, please say so in the description, thanks)

should i tie the lure direct to the leader by papala knot or i use snap swivel? i am trolling in salt clear water. thanks in advance