3. Gray code is the numbering system used to fll in the cordinates of a K-rmap. You are to build a 2-bit Gray code counter that counts the sequence 00, 01, 11, 10, 00, 01, 11, 10, .. Your counter will have one input, IN, that causes the counter to increment on the next clock cycle, if set, and causes the counter to lock, if clear. Design your circuit as an FSA. Draw a state diagram for the counter, a transition table, give simplified equations for the counter, and draw the circuit diagram. 4.Given a standard bus connection with two control lines, Wt and Rd, show the wiring diagram for the following specifications. A 32 4 RAM unit, with addresses 0100000 to 01 1 1 1 1 1. An output device, with address 1000000. An input device, with address 1100000