A 50 kg block sits at rest on a table. A student presses firmly downward on the block at an angle of 25∘ below horizontal with a force of 250 N. The coefficients of static and kinetic friction are 0.5 and 0.2 respectively. a. Does the block begin to move? b. If yes, what is its acceleration? If no, what is the frictional force acting on the block?