Hello,and please help me with the following questions below:

l. The prism is bisected by the xy-plane. The point P = (l, 5, 1). Determine the coordinates of all the points [8] 4. Evaluate the expression for u = 3, -1,0] , v= -1, 2,-1|and w = 1, 1,-2][10] a) u . VX W b) uxv7. Three forces act on a body. A force of 100 N acts toward the south, a force of 100 N acts toward the west and a force of 90 N acts at S 30W . Determine the resultant. [10]