This is questions about HW30 : Extrema of Functions. Please provide answer and explanation.

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A biologist must make a medium to grow a type of bacteria. The percentage of salt in the medium is given by S = 0.0lmgyzz , where S is the percentage expressed as a decimal. And where z, Yy, and z are the amounts in liters of 3 different nutrients mixed together to create the medium. The ideal salt percentage for this type of bacteria is 36.3%. The costs of the x, y, and z nutrient solutions are respectively 4 , 6, and 3 dollars per liter. Determine the minimum cost that can be achieved. (Round your answers to the nearest 4 decimal places.) s ] Submit Answer | Tries 0/99 Find the minimum value of f(z,y) = x? + y2 subject to the constraint 5y = 7 2z. (Round your answer to 4 decimal places) Submit Answer | Tries 0/99 Find the maximum value of the function f(z,y) = 4z 11y> subject to the constraint z? + 11y? = 49. - ] Find the minimum and maximum values of f(x, y) = y2 - a2 - 4x, restricted to 1 144 202 + - y2 = 1, rounded to the nearest integer. minimum: Submit Answer Tries 0/99 maximum: Submit Answer Tries 0/99A biologist must make a medium to grow a type of bacteria. The percentage of salt in the medium is given by S = 0.01332y2z , Where S is the percentage expressed as a decimal. And where z, y, and z are the amounts in liters of 3 different nutrients mixed together to create the medium. The ideal salt percentage for this type of bacteria is 36.3%. The costs of the x, y, and z nutrient solutions are respectively 4 , 6, and 3 dollars per liter. Determine the minimum cost that can be achieved. (Round your answers to the nearest 4 decimal places.) s Submit Answer | | Incorrect. Tries 1/99 Previous Tries