Matlab Nutritional Requirements—A rancher has determined that the minimum weekly nutri- tional requirements for an average-sized horse include 40 lb of protein, 20 lb of carbohydrates, and 45 lb of roughage. These are obtained from the following sources in varying amounts at the prices indicated: Carbohydrates Roughage Protein (lb) (lb) (lb) Cost Hay 0.5 2.0 $1.80 10 3.50 2.0 0.40 (per bale) Oats (per sack) Feeding blocks (per block) High-protein concentrate (per sack) Requirements per horse (per week) 6.0 1.00 40.0 20.0 Formulate a mathematical model to determine how to meet the minimum nutritional requirements at minimum cost.