A combinational circuit is used to control a seven-segment display of decimal digits or English letters, as shown below. The circuit has four inputs (x1,x2,x3,x4), which provide the four-bit code used in packed decimal (English letters) representation. The seven outputs define which segments will be activated to display a given English Capital Letters (A,B,C,D,E,F,G,H,I,J). Note that some combinations of inputs and outputs are not needed. N X1 22 Z3 X2 Combinational circuit BCD digit z 22 23 24 -25 Z6 27 24 X3 X4 Z 26 z (a) 0123456789 Acti (a) Develop a truth tables for this circuit (shown Capital English Letters from A-J). (b) Express Z2 of the truth table in the Products of Sum form. Express Z3 of the truth table in the Sums of Product form. (d) Draw a hardware implementation of Z3