Determine the x, y, z components of reaction at the fixed wall
a. the 150-n force is parallel to the z axis and the 200-n force is parallel to the y axis.

We are given with two forces: 150 Newton parallel to the z axis and 200 N parallel to y-axis. In thsi case, to determine the x,y,z components of the reaction, then we use the pythagorean theorem as it is applicable. R^2 = 150^2 + 200^2 ; R = 250 N. There is no x component in this problem.