Q4. Determine the number of isomorphism classes of 8-regular graphs on 11 vertices. (Explain)
Q6. Count the cycles of length n in Kn and the cycles of length 2n in K„,„.
pio. Find the long codeword for the spanning tree in K10 with the vertex set (A, B, C, D, E, F, G, H, I, J} that corresponds to the short codeword EEJHDCJA.