A.
C = E * B * S = 128B
B.
12 11 10 9 8 7 6 5 4 3 2 1 0
+----+----+----+----+----+----+----+----+----+----+----+----+----+
| CT | CT | CT | CT | CT | CT | CT | CT | CI | CI | CI | CO | CO |
+----+----+----+----+----+----+----+----+----+----+----+----+----+