Derive a series of reactions to convert benzene into metachlorobromobenzene. Select reagents and conditions from the following table, listing them in the order of use.

(1) sulphuric acid (conc.), heat

(2) ${\mathrm{Cl}}_2+{\mathrm{FeCl}}_3\text{ and heat }$

(3) ${\mathrm{NaNO}}_2+{\mathrm{H}}_3{\mathrm{O}}^{+},0^{\mathrm{o}}\mathrm{C}$
(4) ${\mathrm{H}}_2,\mathrm{Pd}/\mathrm{C}\text{ catalyst }$
(5) Mg in ether
(6) ${\mathrm{PBr}}_3$
(7) ${\mathrm{H}}_3{\mathrm{PO}}_2$
(8) ${\mathrm{HNO}}_3\text{ (conc.) }+{\mathrm{H}}_2{\mathrm{SO}}_4\text{ (conc.) and heat }$
(9) ${\mathrm{Cu}}_2{\mathrm{Br}}_2+\mathrm{HBr}$
(10) ${\left({\mathrm{CH}}_3\mathrm{CO}\right)}_2\mathrm{O}+\text{ pyridine }$