Can you please explain the following sample exam question clearly with clear steps. In this sample exam there are no elaborations available namely.

Problem $1$

A point mass moves along the curve y$=-2$x$2,$ where x and y are lengths, expressed in m$.$

expressed in m$.$

The vertical location of the mass at each instant is determined by y$=-53$ m$,$

where t $>=0$ is expressed in seconds. At t $=2$ s$,$ the mass is in the point

$(-4,47$; $-40,0)$ m$.$

Calculate y$,$ Vy$,$ ay$,$ X$,$ Vx and ax at time t $=3$ s$.$