At a particular instant, a moving object has a kinetic energy of $322$ J and a momentum of magnitude $25\mathrm{.}3$ kg x m$/$s

$($a$)$ What is the speed $($in m$/$s$)$ of the object at this instant?

m$/$s

$($b$)$ What is the mass $($in kg$)$ of the object at this instant?

kg