For the grand opening, an arena has selected 5 finalists, each of whom will win a season ticket located in one of 5 sections: The upper balcony, lower balcony, main floor, courtside, or a luxury box.
a. How many different arrangements could there be for this promotion?
b. The arena is also selecting 6 winners out of the final pool of 12 to attend the opening concert. How many different groups of 6 could there be?