A block is pushed against a spring with a spring constant of k $=12\mathrm{.}0$ N$/$cm$,$ compressing it

some distance d $=4.$ cm$.$ When the block is released, it moves along a frictionless, horizontal

surface and then up a frictionless incline with slope $370.$ After being released, the block moves

to the right, and then it travels $4\mathrm{.}8$ m along the surface of the incline before pausing and then

sliding back down. $($Acceleration due to gravity is g $=9\mathrm{.}8$ m$/$s$2)$

$$ What is the mass of the block?

$$ What is the speed of the block when it collides with the spring after sliding back down

the incline?