The next problem is shown on the maps below. Once again, we start by
looking for 1’s that are on one layer, with a corresponding 0 on the other
layer. Although there are several such 1’s on the A 0 layer, only m10
makes a prime implicant essential. Similarly, on the A 1 layer, m30 is covered
by an essential prime implicant. These terms, ACE and ABCD, are
shown on the second map. The 1’s covered are shown as don’t cares on
the next map.