i understand rhe answers are there but can someone expalin the process of working it out.

For Group K cost of attaining education level Y is And for group M the cost is Employees will be offered 50,000 if they have where is the education threshold determined by the employer. They will be offered 130,000 if they have (a) Find the highest level of that can be set and still have only high-productivity people choose to meet it. Ans: 13 (b) Find the lowest level of that can be set and still have high productivity people choose to meet it. Ans: 8 (c) If is set at 10 then who will meet it? Ans: Only high productivity people; Group K (d) If is set at 7 then who will meet it? Ans: Both (e) If is set at 14 then who will meet it? Ans: None