A computer model displays the motion of a particle on a coordinate system in real time. At time t = 0, the particle is at the origin of the coordinate system and has velocity components vx = 0 and vy = 5.6 m/s. The particle has acceleration components of ax = −4.8 m/s2 and ay = 0. (a) What are the x and y positions of the particle at t = 4.5 s