$(30$ points$)$ The system shown is released from rest when the spring is undeformed. As soon as the system is released, Block B starts to slide down the slope. Using the Energy Method, calculate the maximum velocity attained by the block.$\{\begin{array}{ccc}\text{e}\text{n}\text{e}\text{r}\text{g}\text{y}& \text{m}\text{e}\text{t}\text{h}\text{o}\text{d}& \text{:}\end{array}{T}_1+V_1+S_1+U_{1-2}=T_2+V_2+S_2$