8th Ed. Quick magic question

When rolling for the winds of magic do you roll 2d6 for each wizard, or is it you role 2d6 first then an extra d6 for each wizard added a dice of a result of 6????

 

You roll 2d6 for the whole table.
Whoevers turn it is gets the total.
Other person gets the higher of the two dice.

 

Then each wizard roles a d6 and gains an extra power/dispel dice if they roll a 6

 

2d6 first then an extra d6 for each wizard added a dice of a result of 6! <-- this