Provide the prototype for a function called volume_pyramid()that accepts three double precision input parameters, which represent the values of the length, width, and height of a pyramid. The function computes and returns the volume of the pyramid defined by length (l), width (w), and height (h).

Provide the function definition for volume_pyramid(). Also, be sure to provide the function header for volume_pyramid(). Recall, v = (l x w x h) / 3.