Need help with these Calculus problems, please.

' H An isosceles triangle water trough [a trough with isosceles triangles for its ends as shown below] is 13 long and has base 10 ft and height 3 ft. Find the hydrostatic force on one end of the trough if it is full of water. Round the answer, as necessary, to the nearest tenth of a pound. .Question3 VH' A hemispherical plate with diameter 12 ft is submerged vertically 2 ft below the surface of lhe water. Express the hydreslatic force against one side of the plate as an integral and then evaluate it. Round your answer, as necessary, to the nearest whole number. \f. Question 8 v Set up appropriate integrals to nd the coordinates of the centroid of the region bounded by the curves y = 9:, y = D, m = D, and z = 1. Set up the integrals and then use your calculator to integrate, rounding the answer to the nearest thousandth. :]