Find the next two terms in each case:
sequence of dominoes: 1/b, 1/1, 1/2, 1/3, ?, ?
sequence of dominoes: 6/4, 5/3, 4/2. ?. ?
domino sequence: 6/6, 6/5, 5/5, 5/4, 4/4, ?, ?
domino sequence: 1/6, 2/5, 3/4, ?, ?
domino sequence: b/5, 1/b, 1/5, 2/b, 2/5, ?, ?