Which length and radius for X will produce an extension of e8\dfrac{e}{8}8e?
Length: 0.5l0.5l0.5l, Radius: 2r2r2r
Length: lll, Radius: 2r2r2r
Length: 4l4l4l, Radius: 2r2r2r
Length: 2l2l2l, Radius: 2r2r2r