A solid $3-$in$.-$diameter brass $[G=5700$ksi shaft that is $1\mathrm{.}5yd$ long extends through and is completely bonded to a hollow cold$-$rolled stainless steel tube as shown in the figure. Steel tube $(1)G=8100$ksi has an outside diameter of $D_1=4\mathrm{.}25$ in$.,$ an inside diameter of $d_1=3$ in$.,$ and a length of $L_1=1yd.$ Both the brass shaft and the steel tube are securely attached to the wall support at $A.$ Two torques $T_B=13$ Kips$-$ft and $T_C=26$ Kips$-$ft shown are applied to the composite shaft.

Determine the maximum shear stress magnitude in tube $(1)$

Determine the maximum shear stress magnitude in brass shaft segment $(2).$

Determine the maximum shear stress magnitude in brass shaft segment $(3).$

Determine the rotation angle of joint B$.$