$*$Correct answer is on the picture, I need the solution, thank you$*$

The cart B moves to the right with acceleration a$=2\mathrm{.}4$g$.$ If m$=0\mathrm{.}71$kg$,$l$=0\mathrm{.}52$m$,$ and K$=62$N$*($m$)/($r$)$ad$,$ determine the steady$-$state

angular deflection $\backslash$theta of the uniform slender rod of mass $3\mathrm{.}0$ m $.$ Treat the small end sphere of mass m as a particle. The spring, which

exerts a moment of magnitude M$=$K$\backslash$theta on the rod, is undeformed when the rod is vertical.