Assume that the 4-bit arithmetic circuit, shown in figure below (Fig. 4-9 in the textbook), is enclosed in one IC package (also shown below). Show the connections among two such ICs to form an 8-bit arithmetic circuit. S1 SO FA Do A0 A1 A2 ?? 41 MUX 4-bit Arithmetic Circuit IC B0 B1 B2 B3 FA 0 4x MUX C2 out FA 041 MUX FA 041 1MUX