A particle starts from origin at t=0 with a velocity 6.0i1 m/s and moves in x-y plane under action of a force, which produces a constant acceleration of (4.0iî +3.0ÏÎ)m/s². a. What is the y- coordinate of the particle at the instant its x- coordinate is 96m? b. What is the speed of the particle at this time?