Determine if each scenario is either a permutation or combination. do not solve these scenarios. a) an art gallery displays 125 different pieces of artwork at a time. however, 15 pieces are selected to be displayed prominently throughout in the gallery. for instance, the most popular piece is displayed in a location that can be seen as soon as you walk in the door. determine how many ways these more popular 15 pieces can be displayed throughout the gallery. b) an art gallery has a total of 320 different pieces of art. however, only 125 pieces can be displayed at a time. determine how many ways those 125 pieces can be selected.