DRAW A SKETCH AS WELL! A $0\mathrm{.}25[$kg$]$ mass at the end of a spring oscillates $2\mathrm{.}2$ times per second with and amplitude of $0\mathrm{.}15[$m$].$ Determine

$$the speed when it passes the equilibrium point,

$$the speed when it is $0\mathrm{.}10[$m$]$ from equilibrium,

$$the total energy of the system, and

$$the equation describing the motion of the mass, assuming that

at t $=0,$ x was a maximum.