Answer with full step by step workout to q2 (a) (b) (c,i and ii)

Question 2 How does fertilizer affect the yield of corn? An experimenter prepared three types of fertilizers with varying mixes of potassium and nitrogen peroxide. The first set, A, contained an equal mix of potassium and nitrogen peroxide; the second set, B, contained a one to two mix of potassium and nitrogen peroxide; and the third set, C, contained a two to one mix of potassium and nitrogen peroxide. The experimenter divided a large plot of cultivable land into 150 plots and randomly applied each of the fertilizers to 50 plots and planted them with the same corn type. At the end of the harvest the experimenter recorded the yield of corn in kilograms for each of the plots. (a) (2 marks) Is this an experimental or observational study? In less than 50 words clearly explain your choice based on the extract given above. (b) (3 marks) Define an experimental unit. Give an example of an experimental unit from this question and then state how many experimental units received fertilizer C in the study. (c) (3 marks) For the above study identify, if appropriate, i) the response variable(s) ii) the factor 2