I'm having trouble figuring out how this free body diagram would look. The question involves a block at rest on a ramp, which is in turn at rest on a table. All objects are made of the same material, with the same coefficients of friction. Below is what I've got so far, but it doesn't seem correct.
I fail to intuitively get how the friction on the ramp due to the box would affect its movement. Additionally, I'm also not sure if it's correct to introduce the friction due to the table; after all, if I draw yet another free body diagram of the system including both box and ramp, then the friction due to the table still exists - what cancels this force out?