Avideo game developer hires two types of workers to develop games: game coders (x1) and game testers (x2). the developer produces games according to the following production function:

y=x^1/2 1x^1/2 2,

where y stands for the number of games developed per month, and x1 and x2 stand for, respectively, the number of programmers and testers hired per month. because both types of workers freelance using their own tools, the video game developer does not require any other inputs. the markets for both programmers and testers are competitive.