Design a special down counter which counts down (7,6,5,...). However it shall always skip 4. So the sequence shall be 7,6,5,3,2,1,0,7,6,5,3,2,1,0,.... Use the mux to skip 4. Complete all the connections and generate the select logic. 100 A0 272 3-bit (A-B) Subtractor AO 277 2-to-1, 3-bit wide mux Register A1 A1 BIT A2 SO A2 YO DO S1 Y1 D1 Q1 BO S2 BO Y2 D2 868 Q2 B1 B1 CLK B2 B2 S SYSCLK