please help me with 2

Example 2.2-2 (Diet Problem) Ozark Farms uses at least 800 lb of special feed daily. The special feed is a mixture of corn and soybean meal with the following compositions: Ib per Ib of feedstuff Protein Fiber Feedstuff Cost ($/lb) Corn Soybean meal .09 .60 .02 .06 .30 .90 The dietary requirements of the special feed are at least 30% protein and at most 5% fiber. The goal is to determine the daily minimum-cost feed mix. The decision variables of the model are x1 = lb of corn in the daily mix *2 = Ib of soybean meal in the daily mix The objective is to minimize the total daily cost in dollars) of the feed mix-that is, Minimize z = .3.x1 + 9x2 The constraints represent the daily amount of the mix and the dietary requirements. Ozark Farms needs at least 800 lb of feed a day-that is, x1 + x2 800 The amount of protein included in x lb of corn and x2 lb of soybean meal is (.09x1 + 6x2) lb. This quantity should equal at least 30% of the total feed mix (x1 + x2) lb-that is, .09x1 + 6x2 2 3(x1 + x2) In a similar manner, the fiber requirement of at most 5% is represented as .02x1 +.06x2