A uniform solid sphere is rolling without slipping along a horizontal surface with a speed of $6\mathrm{.}20\frac{m}{s}$ when it sarts up a ramp that makes an angle of $25\mathrm{.}0$ with the horizontal. What is the speed of the splere after it has rolled $4\mathrm{.}00$ m up the ramp, measured along the surface of the ramp? $I_{CM}=\frac{3}{5}M{R}^2$

$($I mark$)$