Determine if the following is solved using a Permutation formula or Combination formula and solve the problem:
There are 12 different flavors of Ice creams.
a) How many different kinds of bowls of ice cream can be made using 5 different flavors?
b) How many 3-scoop cones are possible with each scoop being of a different flavor?
c) How many ways can only 4 flavors of ice cream be chosen from the collection?