If x,y,zx, y, zx,y,z are in geometric progression and x+y+z=13x+y+z = 13x+y+z=13 and x2+y2+z2=91x^2+y^2+z^2 = 91x2+y2+z2=91, what is the product xyzxyzxyz?
272727
646464
125125125
216216216