On graph paper, graph $ΔABC$ if $A(-2,7)$, $B(-5,8)$, and $C(-3,1)$.  

1. Reflect $ΔABC$ across the $x$-axis to form $ΔA'B'C'$. Name the coordinates of each new vertex.

2. Now rotate $ΔA'B'C'$ from part (a) $180º$ about the origin $(0,0)$ to form $ΔA''B''C''$. Name the coordinates of each new vertex.

3. Describe a single transformation that would change $ΔABC$ to $ΔA''B''C''$.