A body whose weight is W1=75N is tied to another

Question

body whose weight is W2=45N .If the coefficient of
kinetic friction between W1 and the inclined plane
(25°)AB is 0.15,calculate the coefficient of kinetic
between W2 and the inclined plane(15°) BC when the
two masses slide down at constant velocity. (answer
0.23)

Answer 1

I don't get the picture of the arrangement of the inclined planes at different angle.