4. Use D-flip flop to design a sequential circuit for 3-bit counter for even and odd numbers. Use an input x. to control the counter; when x= 0, the state of the counter does not change. When x = 1, the state sequence is incremented to the next count. Use another input y to change from even count to odd count and vice versa. The even counts are: 000, 010, 100, 110, and repeat. The odd counts are: 001, 011, 101, 111, and repeat. when y-0, any odd count is initialized to 000 regardless of the value of x and when y=1, any even count is initialized to 001 i- Construct the state diagram and match it to one of the following; a- 0 000 010 100x0 x110 011 x101 b- x-0 011 100 110 ( 101 110 x=0 x=0 0 000 010 100xl 110 x=1 ( 001-x-1 011 y=1 x=0 d- x-0 010-X-1 100 ! 001 x011 101 110 x-0 x-0