Digital logic , please i need this in a hour

Design a 3-bit counter using D flip flops that starts from 0 and goes in the sequence of even number than odd numbers and back to zero and repeat the count 0 2 4 6 1 3 5 7 0 and so on.

a. Derive the state diagram and state table.

b. Simplify the Boolean functions representing the input of each flip-flop

c. Draw the circuit.