Problem 1.2.6 A coffee cup from the \"Moonbucks\" coffee shop is like a cylinder with decreasing horizontal cross-section area. The radius of the top circle is R, and that for the bottom is 10% smaller. The cup height is H. Now, a nutty kid drills a pinhole at the half height point of the cup, allowing coffee to leak under the Draining Equation with a draining constant 1:. Compute the time for coffee to leak to the pinhole. Compute the time again if we turn the cup upside down with full cup to start