15. Nutrient Sources/Economics a) Calculate the amount of the fertilizers given in the table below required (kg/ha) and the cost ($/ha) necessary to meet the needs of the lawn as determined in part 4 using first the mixed fertilizer, and then the single nutrient fertilizers. Be careful to include the nitrogen applied when meeting the P requirement with the 11-52-0 fertilizer when determining the amount of 4600 required to meet the rest of the nitrogen requirement. Be sure to show your calculations. \begin{tabular}{l|l|l|l|l|} \hline Fertilizer & & & & \\ Required 10-10-10 (kg/ha) & & & & \\ \hline \hline \end{tabular}