Sarah has $8 and wants to buy a combination of cupcakes and fudge to feed at least 4 siblings. Each cupcake costs $2, and each piece of fudge costs $1. This system of inequalities models the scenario: 2x + y is less than or equal to 8
x + y is greater than or equal to 4.

Part A: Describe the graph of the system of inequalities, including shading and the types of lines graphed. Provide a description of the solution set.
Part B: Is the point (8, 10) included in the solution area for the system? Justify your answer mathematically.
Part C: Choose a point in the solution set and interpret what is means in terms of real-world context.