Figure. gives the x-t plot of a particle executing one-dimensional simple harmonic motion. (You will learn about this motion in more detail in Chapter14). Give the signs of position, velocity and acceleration variables of the particle at `t=0.3s, 1.2s, -1.2s`.

Explanation

`x lt 0, upsilon lt 0, a gt 0, x gt 0, upsilon gt 0, a lt 0, x lt 0, upsilon gt 0, a lt 0`.