A clay sample $($normally consolidated$)$ was consolidated into a triaxial test chamber with a pressure of $153$ kPa. The sample was loaded axially until failure in undrained condition applying an additional stress of $193$ kPa. The pore pressure in excess $($uf$)$ at the time of failure was $27\mathrm{.}6$ kPa. Determine the angle of friction drained and undrained drained.