Pls help I really need it ! On a mathematics test, all correct multiple choice questions are worth 4 points, and all correct true/false questions are worth 2 points. Monica earned a total of 46 points from all of her correctly answered questions. In addition, she answered a total of 13 questions correctly of both multiple choice and true/false combined. Let x = correct multiple choice, let y correct true/false, and let this system of equations represent

the situation: x+y+13

a. Identify the constraints. Explain what they mean. Use complete sentences.
b. Determine if a solution exists. If so, identify it. Here is a graph of the system.