Please solve

The marketing department of a company has determined that if it spends m thousands of dollars on radio advertisements and y thousand dollars on newspaper advertisements, the company's revenue (in thousands of dollars) will be R(a:, y) = 0.06:1:2 1251,12 + 69: + 4y + 5:33; How much money should this company spend on radio advertisements and newspaper advertisements to maximize its revenue? Radio: $ Newspaper: $