Write Java source code to take an integer n and returns the sum of all odd positive integers less than or equals to n. Please implement a sumOddo method for major functionality and a main method with input data for testing cases. Please pay attention to the neat coding style in Java, including grammar, indentations, naming of variables and methods, and comments. a) Conduct an experimental study regarding the running time of your Java code in nanoseconds. Please draw on a separate sheet of paper for the chart/figure on the evaluation results.

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