Answer attached question

Consider the information below: For Group A the cost of attaining an educational level y is CA(y) = 2, 000y and for group B the cost of attaining that level is CB(y) = 4, 000y Employees will be offered 30, 000 if they have y y*. Answer the following questions: b) What is the lowest level of y* that can be set and still have only the high-productivity people meet it