Avector is a quantity with both magnitude and direction. in problems involving vectors, we sometimes need the unit vectoropens in new tab. this operation takes a vector and divides it by its magnitude. create a function (prob2_5.m) that, given a three-element vector, r, will calculate the three-element vector, u. the operation is described below: where rx, ry, rz are the components of the vector r. do not use any built-in unit vector functions in matlab