First,when you attack using a spell with 7 power and you roll 9 on Discipline do the opponent need to pass the 9 success of yours to avoid being hit or the power of 7 which you put into the spell ?
Second,when you make a Block using evocation can you put 3 power to make the dificulty of the block, 2 to prolong it's effect and 2 to effect multiple allies in the same zone,for a total of 7 power all in a single block action?Also,when I put 5 power to my evocation block it doesn't matter how high I rolled for discipline as long as I rolled at least a total of 5 right?For example : I put 5 power and I have a result of 7 discipline,my opponent doesn't need to beat the 7 total but the 5 power I put in it right?
And,because the example in the book confused me,if you spend 2 power in your evocation block to prolong it's duration you get it's effect for 3 exchanges total,the one you just used it in and the two after that right?
Third,if you want to draw a protective magic circle in the middle of combat to protect your allies,how it can be done?
Fourth,,is it possible an evocation block with fire as the element?
Last,when a werewolf wants to change form man to wolf after combat has started what kind of action it will be?

Sorry if I confused you!I am really excited with this rpg.
Thanks for the support!

Good evening!
I am a new GM at the DFRPG and I have a question about a player who wants to create a focused parctitioner character.
My question is:is it possible when you create the focused practitioner at the Up to your Waist power level with 7 refresh to buy channeling(one of the musts) and thaumaturgy to start with or a practitioner doesn't have access to thaumaturgy and evocation till he grows up by exercising?
Also,if for example a player uses a fireball spell to attack a monster, what skilla the monster will roll for defence?
Thank you very much for your support!