The rigid bars a c ac and e d b edb are pinned to a wall at a a and e e, respectively, and pinned together at b b. bar a c ac is subjected to a triangular distributed load with w = 5 k n / m w=5 kn/m. consider the following dimensions: a = 619 m m a=619 mm, b = 77 m m b=77 mm, c = 464 m m c=464 mm, d = 155 m m d=155 mm and l = 1547 m m l=1547 mm matlab input: a = 619; b = 77; c = 464; d = 155; l = 1547; w = 5; determine the reaction force at pin a a, r a ra. input the reaction as vector components according to the included coordinate system.