Please help me to answer this.

Problem No. 2 An electronics manufacturing company has three production plants, each of which produces three different models of a particular MP3 player. The daily capacities of the three plants are shown in the table. Basic Model Gold Model Platinum Model Plant 1 8 000 4 000 8 000 Plant 2 6 000 6 000 3 000 Plant 3 12 000 4 000 8 000 The total demands are 300,000 units of the Basic model, 172,000 units of the Gold model, and 249,500 units of the Platinum model. The daily operating costs are Php55,000 for plant 1, Php60,000 for plant 2, and Php60,000 for plant 3. How many days should each plant be operated in order to fill the total demand while keeping the operating cost at a minimum? Question 5 (2 points) Which of the following is the objective function? Assume X = Plant 1, Y = Plant 2, Y = Plant 3 Min = 8 000x + 6 000y + 12 000z Min = 55 000x + 60 000y + 60 000z Min = 4 000x + 6 000y + 4 000z OMin = 8 000x + 3 000y + 8 000z