Motion in a plane

A particle starts from the origin at t = 0 s with a velocity of 10.0 jɵ m/s and moves in
the x-y plane with a constant acceleration of (8.0 2.0 )
ɵ ɵ
i j + m s-2. (a) At what time is
the x- coordinate of the particle 16 m? What is the y-coordinate of the particle at
that time? (b) What is the speed of the particle at the time ?