A $20$ kg box moving at an initial speed of $10$ m$/$s slides $25$ m to the right on a horizontal floor before it comes to a complete stop$\mathrm{.}4.$ What is the coefficient of friction between the box and the floor?$($A$)0\mathrm{.}10($B$)0\mathrm{.}20($C$)0\mathrm{.}40($D$)0\mathrm{.}60($E$)0\mathrm{.}80$