a. Determine the result of inserting the keys 4,19, 17, 11, 3, 12, 8, 20, 22, 23, 13, 18, 14, 16, 1, 2, 24, 25, 26, 5 in order to an empty B-Tree of degree 3. Only draw the configurations of the tree just before some node must divide, and also draw the final configuration.
b. Explain NP-complete decision problem. Consider the example of Hamiltonian circuit and define how closely related decision problems are polynomially reducible