1.  4
2.  2,3,6
3.  Cross-coupled nor's, or cross-coupled nands.
4.  Mealy has outputs function of state and inputs, Moore output function only
	of state
5.  Cn = Gn-1 + Pn-1Gn-2 + Pn-1Pn-2Gn-3 ...
6.  Think about the adder equations, and how you design using muxes.
7.  The data word was 0.  (Which you can tell simply by looking, right?)
8.  y1' = y2 
    y2'=~y2y3 + xy1 + ~x~y1~y3
    y3'=~xy1 + y1y2 + x~y1~y2 + ~xy2y3 + x~y1~y3
    z  = xy3 + ~xy1~y3

9.  J=~y3, k=~y3
    S = y1~y2y3 + ~y1~y2~y3, R = ~y1y2~y3 + y1y2y3
    T = y2

10. There are 6 states (0,5,10,15,20,25).  From this you should be able to 
draw the appropriate arcs.