int num1, num2, num3; double length, width, height; double volume; num1 = 6; num2 = 7; num3 = 4; length = 6.2; width = 2.3; height = 3.4and the function prototype: double box(double, double, double);Which of the following statements are valid? If they are invalid, explain why.a. volume = box(length, width, height);

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