Q1: Discuss ways in which the current telephone numbering plan can be extended to accommodate the rapid demand for more telephone numbers. (See if you can find some of the proposals coming from the telecommunications industry.) For each new numbering plan you discuss, show how to find the number of different telephone numbers it supports. (4 points) Q2: Describe the origins of probability theory and the first uses of this theory, including those by Cardano, Pascal, and Laplace.( 4 points) Q3: Describe the basic principles of relational databases, going beyond what was covered in Section 9.2. How widely used are relational databases as compared with other types of databases? ( 4 points) Q4: Describe the origins and development of graph theory prior to the year 1900. ( 4 points) Q5: Define (A well known type of trees ex: AVL-trees (sometimes also known as height- balanced trees) / Binary trees etc). Describe how and why these trees are used in a variety of different algorithms. ( 4 points)