The length, width w, and height h of a box change with time. At a certain instant the dimensions are = 6 m and w = h = 4 m, and and w are increasing at a ra 7 m/s while h is decreasing at a rate of 2 m/s. At that instant find the rates at which the following quantities are changing. (a) The volume. m/s (b) The surface area. m/s (c) The length of a diagonal. (Round your answer to two decimal places.) 1m/s