Find the equation of the hyperbola whose
(i) vertices are `(pm3,0)` and foci are `(pm5,0)`
(ii) vertices are `(p0,m2)` and foci are `(0,pm3)`
(iii) Foci are `(0,pm5)` and length of transverse axis is 8.
(iv) Foci are `(pm13,0)` and length of conjugate axis is 10.