Fig. $3$

The $32$ mm diameter

Fig. $3$ solid steel shaft shown in Fig. $3$ of "Torsion Assignment Figures" has a shear modulus of G$=85$ GPa $.$ The shaft is subjected to torques T$1=74Nm,T2=16Nm$ and T$3=55$ Nm $.$

Determine the angle of twist of end $B$ relative to end

A$.$ The answer should be given in degrees correct to two decimal places with sign convention according to the right hand rule.