3. A 7kg block is held by three strings as shown in the figure below. The string on the left is pulling horizontally with a force of 233N. The string in the center pulls down with a force of 50N, and the string on the right pull at an unknown angle . ( 3 points) i) Draw free-body diagram for 7 - kg block. ii) If the object is at equilibrium, write down the expressions for the horizontal and vertical components of the forces on the block. iii) Find tension TR and the angle it makes with the horizontal