Will give brainliest the displacement, x meters, from the origin at time, t seconds, of a particle moving in a straight line is given by x=t^3 -9t^2 +4 (i) find the particle's initial position. (ii) find an expression for the velocity as a function of time. (iii) find an expression for the acceleration as a function of time. (iv) at what times is the particle stationary? (v)at what time is the acceleration zero? find its velocity and position then