3. (3 Points) A comparator circuit has two 1-bit inputs A and B and three 1-bit outputs G (greater), E (Equal) and L (less than). Refer to Figures below B Lis I if A B Eis 1 ifA 0 otherwise 0 otherwise 0 otherwise A (3] B(3] B [2] EQUAL A 11 811) A [o] B [o Draw the truth table for a 1-bit comparator A B GE L b. Implement G, E and L using AND, OR, and NOT gates. This can be done in Logisim or hand drawn Using the 1-bit comparator from (b) above as a basic building block, construct a four-bit equality checker, such that output EQUAL is 1 if A[3:0] B[3:0], 0 otherwise c