ANSWER
M(2, -4), N(-2, 4)
Step-by-step explanation
We know that the coordinates of point L are (-2, -4). When it is reflected across the y-axis to obtain point M, the sign of the x-coordinate is changed,
So, the coordinates of point M are (2, -4).
Then, L is reflected across the x-axis to obtain point N, so its y-coordinate changes its sign instead,
So the coordinates of point N are (-2, 4).
Hence, the coordinates of points M and N are M(2, -4), N(-2, 4).