12.8 A submerged gate is shown below. You may assume that the angle ø = 40ð. The gate has a weight, W, and a length of 5 ft. If there is minimal friction between the bottom of the gate and the river bed, how much does the gate have to weigh to ensure that it makes contact with the bottom of the river bed, and what is the reaction at the pin joint? You may assume that h = 6 ft and H = 15/t, and the gate extends 3 ft into the page.