I need help on this question especially 2,3,4

if you can show 1 so i can match with my solution what i can get right or wrong plz help me!

Problems 1-4 refer to the Blending Problem discussed in class: (Blending Problem # 1) To feed the stock, a farmer purchases two kinds of feed. The farmer has determined that the herd requires 60, 84, and 72 units of the nutritional elements A, B, and C, respectively, per day. The contents and cost of a pound of each of the two feeds are given in the following table. Nutritional elements (units/1b) A B C Cost (cents/lb) Feed 1 3 Feed 2 2 2 5 09 10 4 Requirements 60 84 72 min 10x + 4y subject to 3r + 2y 2 60 71 + 2y > 84 3r + 6y > 72 I, y 201. The farmer has determined that as long as the ratio of the cost of Feed 1 to the cost of Feed 2 is bet-wean % and 3, an adequate diet of minimal cost can he achieved by using 13 lb of Feed 1 and 3 lb of Feed 2. Explain. 2. Thin]: about the work we did with slopes and ratios in class. {a} What should the ratio of the costs of the feeds be so that the farmer uses only Feed 1 to feed her stock? (h) 1What should the ratio of the costs of the feeds be so that the farmer uses only Feed 2 to feed her stock? 3. After reviewing his mother's mathematical formulation of the feed problem, the farmer's son clairns that in general the constraining inequalities should he equalities. He reasons that money must he wasted if some of the nutritional elements are fed to the stock at a leml above the minimal requirements. Is this true? Decide what would happen if all the constraints have equal signs instead of inequality signs. 4. After some study, the farmer has decided that 4|] units of nutritional element D are also critical for the daily feeding of his stock. Cine pound of Feed 1 contains 4 units element D, and Feed 2 contains 2 units of element D. How does this change the analysis of the original problem?I (Hint: Formulate the updated problem, graph the new inequality, and see 1:Ivllat happens}