Design a circuit with 4 inputs: A0, A1, A2, A3, and 1 output: E This circuit will check the numbers of Is in the 4 inputs, if it has even numbers of Is, E will be 1, otherwise E will be 0. E.g, If in A0-3 there are zero Is, two Is, or four 1s, then E will be 1; If in A0-3 there are one l or three Is, then E will be 0 1) Draw a truth table of the desired circuit. 2) Apply K-map to get the Boolean expression of E 3) Draw the circuit based on the Boolean expression