Answer
See below.
Work Step by Step
If we select:
$X_{min}$ to be lower than all x-coordinates of the points (e.g., $-90$);
$X_{max}$ to be greater than all x-coordinates of the points (e.g., $30$);
$Y_{min}$ to be lower than all y-coordinates of the points (e.g., $−50$);
$Y_{max}$ to be greater than all y-coordinates of the points (e.g., $70$);
and set $X_{scl}=10,Y_{scl}=10$; then we get a good solution.