K An advertising company wants to attract new customers by placing a total of at most 12 ads in 3 newspapers. Each ad in the Sentinel costs $200 and will be read by 2,500 people. Each ad in the Journal costs $100 and will be read by 500 people. Each ad in the Tribune costs $50 and will be read by 2,000 people. The company wants at least 29,000 people to read its ads. How many ads should it place in each paper in order to minimize the advertising costs? What is the minimum cost? Construct a mathematical model in the form of a linear programming problem. Use x, to represent the number of ads placed in the Sentinel, x2 to represent the number of ads placed in the Journal, and x, to represent the number of ads placed in the Tribune. Minimize subject to C- 12 29,000 X 01 x2. Select the correct answer below and, if necessary, fill in the corresponding answer boxes. OA. The minimum cost is $ and is achieved by placing ads in the Sentinel, ads in the Journal, and ads in the Tribune. (Simplify your answers.)