Question: 1. Let connected simple G have vertices of degrees 4,4,4,5,5,5,6,6,6,7,7,7. Prove that G is non-planar.
2. How many ways are there to deal a standard deck of 52 cards to seven players?
3. Decrypt the message O lkfz me hkaj atd sy negrz ot tne jatck frour, which was encrypted using a Vigen`ere cipher with key word gaga. Which type of Vigen`ere cipher was used?