Carolina Hernan Due in 3 hours, 31 minutes. Due Sun 04/23/2023 11 The marketing department of a company has determined that if it spends a thousands of dollars on radio advertisements and y thousand dollars on newspaper advertisements, the company's revenue (in thousands of dollars) will be R(x, y) = - 0.07x2 - 125y2 + 4x + 6y + 5xy How much money should this company spend on radio advertisements and newspaper advertisements to maximize its revenue? Radio: $ Newspaper: $