A bridge with a total length of 60 m is supported by two symmetrically placed supporting pillars, which are 20 meters apart. There are currently two vehicles on the bridge. A car weighing 1500 kg is 10 m away from the right end of the bridge. A van, which weighs 4 t, is driving in the opposite direction and is located 15 m from the left end of the bridge. Calculate the force on each pillar.
and 
respectively.
