To determine the equation of the cylinder circumscribed to the beads: $(e1)x-2)^2+(y-1)^2+z^2=25" alt="(e1)x-2)^2+(y-1)^2+z^2=25" /> and $(e2):x^2+y^2+z^2=25$
$x^2+4y^2+5z^2-4xy-125=0$