The student council is planning for their end of year picnic. They are buying salads and sandwiches for their students. They only have $120 in their account to pay for lunch for each student, and they need to buy for at least 25 students. Sandwiches cost $4 and salads cost $6. The diagram below represents the system of inequalities used to represent this situation. Part A The green line represents the total cost function. What are the intercepts for this line? Answer in the format a, b, where a is the x-intercept and b is the y-intercept without spacing after the comma Part B If the orange line represents the total number of items function, which region should be shaded in this system of inequalities?