A vertical semi-circular gate, diameter horizontal and lower-most is hinged along the diameter, while the upper-most part is resting against the vertical side of the tank in which it is placed. The gate's diameter is 8m, and 10 m below the water surface in the tank. Find the reaction at the upper most part of the gate that is resting against the wall of the tank in KN. a. 762.48 b. 799.67 c. 830.75 d. 810.22