2. A teacher is decorating their classroom by placing posters in a row on one wall. The teacher has 12 posters, of which 4 are colored and 8 are black 8:. white. a) If the teacher decides to only use 6 posters, determine how many arrangements can he made? Describe 2 different ways to get an answer to this problem. /2 b) If the teacher uses all 12 posters, but wants to have a black 82; white poster at each end, how many arrangements can be made? Justify your answer. II c) If the teacher uses all 12 posters, but wants all the colored posters to be side-by- side, how many arrangements can be made? Justify your answer. /1