A soil sample $($dry sand$)$ has been tested using the 'direct shear box test' to find its shear strength parameters. The applied vertical $($normal$)$ stress was $191\mathrm{.}5k\frac{N}{m^2}.$ The shear failure happened at a shear stress measured as $119\mathrm{.}7k\frac{N}{m^2}.$ Find the shear strength parameters. Also, determine the shear stress at which another sample of the same soil will fail if the applied vertical load is $370N($dimensions of the sample are $50\mathrm{.}8mm**50\mathrm{.}8mm$