Please solve a , b and c and draw the logic diagram of the circuit

and thank you so much

2) Design a 3 bit up/down counter using T flip-flops. The counter has a control input x. When x=0 the counter should count down, and when x=1 the counter should count up. (a) Draw the correponding state diagram. (b) List the state table and design the circuit using T flip-flops. (c) Draw the logic diagram of the circuit