Two blocks are attached to one another by a rope and are sliding together down a ramp as shown in the figure. The mass of block A is $2$ kg $,$ the mass of block B is $6$ kg $,$ and $\backslash (\backslash$theta$=\backslash )\backslash (57^\{\backslash$circ$\}\backslash ).$ The coefficient of kinetic friction between block $\backslash ($ A $\backslash )$ and the ramp is $0\mathrm{.}21$ and the coefficient of kinetic friction between block $\backslash ($ B $\backslash )$ and the ramp is $0\mathrm{.}33.$ What is the tension $($in N $)$ in the rope?