Suppose your newspaper is trying to decide between two competing desktop publishing software packages: Macro Publish and Turbo Publish. You estimate that if you purchase x copies of Macro Publish and y copies of Turbo Publish, your company's daily productivity will be U(x, y) = 4x0.9,0.5 + x, where U(x, y) is measured in pages per day (U is called a utility function). If x = y = 10, calculate the effect of increasing x by 1 unit. (Round your answers to two decimal places.) x pages per day Interpret the result. This means that, if your company now has 10 copies of Macro Publish and 10 copies of Turbo Publish, then the purchase of one additional copy of Macro Publish will result in a productivity increase of approximately * pages per day