An $0\mathrm{.}80$kg object is attached to one end of a spring, as in Figure $10\mathrm{.}5$ and the system is set into simple harmonic motion. The displacement x of the object as a function of time is shown in the drawing. With the aid of these data, determine $($a$)$ the amplitude A of the function, $($b$)$ the speed of the object at t$=1\mathrm{.}0$s$,$ and $($c$)$ the magnitude of the

object's acceleration at t$=1\mathrm{.}0$s$.$