ONLY GIVE THE ANSWERS, NO EXPLANATION IS REQUIRED. Suppose that 10 people (A,B,C,D,E,F,G,H,J,K) are in a room and 5 of them stand in a row for a photo. (a) In how many ways can this be done if A and B are to be in the photo ? (b) In how many ways can this be done if A and B are in the photo, standing next to each other? (c) In how many ways can this be done if A and B are in the photo, but not standing next to each other