Question $3$: Structure #$2$ is stacked on top of Structure #$1$; what is the location of the new Center of Gravity $($COG$)$ of the combined structures $($please define origin, and provide $\text{'}x\text{'}$ and $\text{'}Y\text{'}$ dimensions of new CoG$)$

Question $4$: For the $2-$point lift depicted below, what is the tension in Sling $1$ and Sling $2$