please help, thanks :)

Michelle has $9 and wants to buy a combination of dog food to feed at least two dogs at the animal shelter. A serving of dry food costs $1, and a serving of wet food costs $3. Part A: Write the system of inequalities that models this scenario. Part B: Describe the graph of the system of inequalities, including shading and the types of lines graphed. Provide a description of the solution set.