please help

Problem $3\mathrm{.}5$

A funnel structure $($going from $x=0$ to $2L)$ is fixed at its left end and is subjected to an external torque of $2T$ at $x=L$ and $T$ at $x=2L.$

Each cross$-$section of the member is circular. The radius from $x=0$ to $L$ is $\sqrt[4]{2}{r}_0$ and from $L$ to $2L$ is $r(x)=\sqrt[4]{\frac{2x}{L}}**r_0$

Calculate the twist angle $$ at $x=2$ L$.$ Show all your answers with five digits after the decimal. Make sure you solve the problem

symbolically first before substituting any values.

$L=,950mm$

$r_0=,60mm$

$T=,1,500,000N*mm$

$G=,20,000\frac{N}{m}{m}^2$

please