Chapter 8, Problem 16E

A mathematics textbook consists of 10 chapters. Although many of the chapters are independent of the others, some chapters require that previous chapters be covered first. The following list describes all the chapter dependences: $Chapter1$ is a prerequisite to $Chapter3\text{ and }5$; $Chapter2\text{ and }9$ are both prerequisites to $Chapter10$; $Chapter3$ is a prerequisite to $Chapter3$; and $Chapter4$ is a prerequisite to $Chapter7$, which in turn is a prerequisite to $Chapter8$. Draw a digraph that describes the dependences among the chapters in the book.