The coordinates of a particle which moves with curvilinear motion are given by x = 10.25t + 1.75t² − 0.45t³ and y = 6.32 + 14.65t − 2.48t², where x and y are in millimeters and the time t is in seconds. Determine the values of u, v, a, a, e_r, e_n, a_t, a_t, a_n, a_n, ρ, and β˙ (the angular velocity of the normal to the path) when t = 3.25 s. Express all vectors in terms of the unit vectors i and j.