1. The problem asks how to solve part b and sketch its graph. 2. Since part b is not explicitly given, let's clarify or define the function or equation for part b. 3. Assuming part b refers to a function or equation, solve it algebraically by isolating the variable or finding its roots. 4. To sketch the graph, identify key features like intercepts (where the graph crosses the axes) and extrema (maximum or minimum points). 5. Plot these points and draw a smooth curve connecting them respecting the function's behavior. 6. For specific instructions, please provide the exact equation or function referred to as part b.