Problem 4. In the same department, a worker lifts a piece of equipment with both hands while standing with both feet on level ground. The worker is lifting and pulling with a combined force of 300 Newtons at a 45-degree angle to the ground. The individual's body angles, and anthropometric data are shown in the following picture and table. (Note that because this is a 2D calculation issue, you do not need to divide the forces across the two hands and two arms!!!) Please calculate (a) the reactive forces (0.2 pt) and (b) the reactive moments for shoulder joint in the given linkage (1.0 pt). The head weight and hand weight are ignored in this problem. Hint: 1. Given this is a static problem, you need apply the equations of equilibrium for both force and moment to solve for the reactive forces and moments. 2. You may specify a force by its horizontal and vertical components. It is suggested you define a positive direction for the force components (e.g., X and Y) and the moments (e.g., counterclockwise or clockwise). 3. When you decompose the force into horizontal and vertical components to calculate the corresponding horizontal and vertical components of the reactive forces, do not forget to calculate the resultant force in the end. Also, since force is a vector, you need to also specify its direction