? The vertical cross-section of a. ramp in a skateboard park is modelled by the function ((x) = 10.67 - 1.ox + 0.0417x , where x is the horizontal distance in metres from the start and fixy is the vertical distance above the ground in metres, The ramp has been constructed in such a way that part of its base lies below the level of the ground around the ramp a Find the minimum depth of the run b Find the x-intercepts and explain what these values represent