1. $ABCD$ is a rhombus.

The diagonals, $AC$ and $BD$, intersect at the point $M$. The coordinates of $M$ are $(6,−11)$

The points $A$ and $C$ both lie on the line with equation $2y+7x=20$

Find the exact coordinates of the point where the line through $B$ and $D$ intersects the $y-axis$.